How to Fix a Golf Shank With the Right Arm Position
Let's talk about fixing a shank. In all probability, when you are coming into the golf ball, you have your arms too far out in front of you. As the handle moves out towards the golf ball that drops the head of the club too far to the inside.
Why You Shank the Ball (and How to Fix It)
You can see that if I get my arms out in front I have taken away all the room I need to get the clubhead to the inside of part of the golf ball. To fix your shank try bringing your hands in closer to your right leg on the downswing, that will help deliver the golf club on an inside path to the ball.
I will demonstrate one for you. You can see how the club comes from the inside and then circles back around to the inside on the through-swing. If you are shanking, keep your hands towards the inside, close to your right leg, that will help deliver the golf club right square to the back of the golf ball.