Finding the Fourth Proportional to 90.29, 124.61 and 62.71

Step by Step Solution

1. Step 1: Write the proportion equation
   90.29 : 124.61 = 62.71 : x
2. Step 2: Convert to fraction form
   90.29/124.61 = 62.71/x
3. Step 3: Cross multiply
   90.29x = 124.61 × 62.71
4. Step 4: Simplify right side
   90.29x = 7,813.67
5. Step 5: Solve for x
   x = 7,813.67/90.29
6. Step 6: Final answer
   x = 86.54