Finding the Fourth Proportional to 76.72, 105.93 and 53.37

Step by Step Solution

1. Step 1: Write the proportion equation
   76.72 : 105.93 = 53.37 : x
2. Step 2: Convert to fraction form
   76.72/105.93 = 53.37/x
3. Step 3: Cross multiply
   76.72x = 105.93 × 53.37
4. Step 4: Simplify right side
   76.72x = 5,653.22
5. Step 5: Solve for x
   x = 5,653.22/76.72
6. Step 6: Final answer
   x = 73.68