7-3-6 progression is just like any other progression, you are just following the bass. If you look up circle of fourths you will find a chart that 80% of songs follow.
What you have to do is follow the bass (listen and play what you hear) on your left hand and play the chord that goes with it on the right. Depending on the song and your experience you may also add tones ( or passing ) in between. For ex. if you hear a 1-6-5-4 as you have asked. You can play (if the tempo permits) a 7-3 or just the 3 in between the 1 and the 6. You can also play a 2 between the 6 and the 5, and a 1 between the 5 and the 4. Not saying for you do all of these but you can spice up the song by adding them at different times. Again, I say if the tempo permits.
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Tip......
*It also allows you to learn your major scales very quickly because the one on the left or right of the key that you are on is only one letter different. if you are in the Key of C (C-D-E-F-G-A-B-C) F is on the left of C (F-G-A-Bb-C-D-E-F) G is one the right of C (G-A-B-C-D-E-F#-G) the only difference is the order.*
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