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: [188.727, 75.518, 33.819, -59.29, 245.889, -87.245, 67.812, 178.693, -46.386, -98.263]

49.927