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: [92.834, -26.072, -36.119, 97.442, 230.349, 224.718, 201.615, 159.667, 140.457, 47.4]

113.229