Definition: In this task you will be given a list of numbers and you need to find the mean (average) of that list. The mean of a list can be found by summing every number in the list then dividing the result by the size of that list. The output should be rounded to 3 decimal places.
Input: [192.722, 65.944, 10.138, 68.805, 21.039, 248.545, 103.754, 205.84, 12.475]

103.251