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.
[238.992, -12.044, -82.279, 79.807, 9.069, -77.013, -61.398, 137.857, 128.997, 126.157]