Finding the Fourth Proportional to 88.02, 131.15 and 82.50

Step by Step Solution

1. Step 1: Write the proportion equation
   88.02 : 131.15 = 82.50 : x
2. Step 2: Convert to fraction form
   88.02/131.15 = 82.50/x
3. Step 3: Cross multiply
   88.02x = 131.15 × 82.50
4. Step 4: Simplify right side
   88.02x = 10,819.46
5. Step 5: Solve for x
   x = 10,819.46/88.02
6. Step 6: Final answer
   x = 122.92