Finding the Fourth Proportional to 71.72, 107.16 and 59.56

Step by Step Solution

1. Step 1: Write the proportion equation
   71.72 : 107.16 = 59.56 : x
2. Step 2: Convert to fraction form
   71.72/107.16 = 59.56/x
3. Step 3: Cross multiply
   71.72x = 107.16 × 59.56
4. Step 4: Simplify right side
   71.72x = 6,382.45
5. Step 5: Solve for x
   x = 6,382.45/71.72
6. Step 6: Final answer
   x = 88.99