Finding the Fourth Proportional to 90.72, 124.91 and 82.62

Step by Step Solution

1. Step 1: Write the proportion equation
   90.72 : 124.91 = 82.62 : x
2. Step 2: Convert to fraction form
   90.72/124.91 = 82.62/x
3. Step 3: Cross multiply
   90.72x = 124.91 × 82.62
4. Step 4: Simplify right side
   90.72x = 10,320.06
5. Step 5: Solve for x
   x = 10,320.06/90.72
6. Step 6: Final answer
   x = 113.76