Hint: We can obtain a natural number after 10999 by addition of 1 consecutively. Natural numbers are all the positive integers.
Complete step-by-step answer: Here, we need to understand the concept of natural numbers in the number system. Natural numbers are part of a number system which includes all positive integers starting from 1. It is an integer which is always greater than zero (0). Integers are the numbers of the number system which includes negative numbers such as -1, -8 etc. and whole numbers (like 0, 1, 2, 3.....). Integers do not includes fractions (like \[\dfrac{1}{2}\], \[\dfrac{4}{5}\], etc.) and decimal numbers (like 0.5, 1.5, 3.2, etc). So, here we shall proceed with the addition of 1 and get the successor of the number 10999. The three next natural numbers after 10999 are given by, 10999 + 1 = 11000 Here, we get our first required natural number which is 11000, the next natural number will be given by adding 1 to the natural number we just obtained i.e 11000, 11000 + 1 = 11001 Now, as we obtained our second required natural number we will proceed over to find the third and the last natural number which will be given by again adding 1 to the second natural number we obtained i.e 11001, 11001 + 1 = 11002 So, our third and last natural number is 11002 Hence the three required natural numbers after 10999 are 11000, 11001 and 11002.
Note: We should know that natural numbers are subsets of integers which will never consist of zero, negative numbers, fraction numbers or decimal numbers.