In this task, you are given a list. This list contains many lists of integers. The list is several items written within a []. Your task is to find the maximum number among the members of each inner list. The output should be a list comprised of the maximums with the same order as the internal lists.
[[-46, -57, -153, -20], [-25, -43, -6, 23, -141], [-112, -192, -118, -31, -191], [15, -5, -12, -175, -184, -131]]