In this task, you will be given a list of numbers. The goal is to divide all the numbers in the list by a constant such that the sum of the resulting list is 1. The output should be rounded to 3 decimals.
[218.611, 147.038, 12.74, 223.737, 161.513, -29.919, 243.291, 54.981, -99.335, 23.486]