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.
[69.468, 238.468, 129.245, 52.742, 124.256, 38.897, 7.2, 112.203]