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: [180.749, -19.537, 78.772, -94.27, 136.604, 90.492, 229.499, -5.276, 243.106, 85.937]

92.608