Finding the Fourth Proportional to 72.64, 108.76 and 59.12

Step by Step Solution

1. Step 1: Write the proportion equation
   72.64 : 108.76 = 59.12 : x
2. Step 2: Convert to fraction form
   72.64/108.76 = 59.12/x
3. Step 3: Cross multiply
   72.64x = 108.76 × 59.12
4. Step 4: Simplify right side
   72.64x = 6,429.89
5. Step 5: Solve for x
   x = 6,429.89/72.64
6. Step 6: Final answer
   x = 88.52