Finding the Fourth Proportional to 88.72, 132.43 and 82.24

Step by Step Solution

1. Step 1: Write the proportion equation
   88.72 : 132.43 = 82.24 : x
2. Step 2: Convert to fraction form
   88.72/132.43 = 82.24/x
3. Step 3: Cross multiply
   88.72x = 132.43 × 82.24
4. Step 4: Simplify right side
   88.72x = 10,891.04
5. Step 5: Solve for x
   x = 10,891.04/88.72
6. Step 6: Final answer
   x = 122.76