Pedro travels 286 miles in 4 hours, 24 minutes.
4 hours, 24 minutes in hours is given to be:

Therefore, the number of miles travelled per hour is calculated to be:

5 hours, 24 minutes in hours is given to be:

With the rate calculated earlier, the distance travelled in 5.4 hours will be:

Pedro travelled 351 miles in 5 hours and 24 minutes.