What is the fourth hole?

To answer accurately, I need more context. "The fourth hole" could refer to many things, such as:

• A golf course hole: This is the most likely meaning. To give you information, I'd need to know which golf course. The fourth hole at Augusta National is vastly different from the fourth hole at a local municipal course.
• A hole in a piece of clothing or fabric: This would require information about the item of clothing.
• A hole in something else: This is very broad. It could be a hole in the ground, a hole in a wall, a hole in a strategy, etc. More specifics are needed.
• A metaphorical "hole": This could be a gap in a system, a missing piece of information, etc.

Please clarify what kind of "fourth hole" you're interested in.