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: [17.792, -87.519, 126.087, -52.176, 157.829, -45.206, 173.143, 91.596]

47.693