Coordination of skeletal muscle activity is one of the functions of the cerebellum. Another is .

Motor cortex.

Explanation:

Motor cortex is the part of the brain that is responsible for the coordination of skeletal muscle activity.  Motor cortex is located in the frontal lobe which allows for the precise and accurate voluntary movements of our skeletal muscles. All  voluntary movements are commanded by the motor cortex, that is located in the zone of the cerebrum which is present behind the frontal lobe so we can conclude that motor cortex is the another part which is responsible for the coordination of skeletal muscle activity.