>>6647841 lb
Making a prediction that, as a series of watches, the seconds are progressing in a sequence of +10, +15, (next)+15.
Minutes increase by multiplying previous watch’s minute increase times 3. So minutes increase from 9 to 27 to (next)81 minutes.
So adding 20 seconds to the last watch seconds of 55, And adding 81 minutes to the last watch seconds of 42, makes the next watch time in sequence at 17:03:15.