Finding the Fourth Proportional to 72.92, 100.71 and 59.15

Step by Step Solution

1. Step 1: Write the proportion equation
   72.92 : 100.71 = 59.15 : x
2. Step 2: Convert to fraction form
   72.92/100.71 = 59.15/x
3. Step 3: Cross multiply
   72.92x = 100.71 × 59.15
4. Step 4: Simplify right side
   72.92x = 5,957.25
5. Step 5: Solve for x
   x = 5,957.25/72.92
6. Step 6: Final answer
   x = 81.69