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: [144.072, 49.947, 218.657, -59.19, -70.341, 150.757, -0.989, -39.73, 145.329, -79.324]

45.919