Finding the Fourth Proportional to 90.37, 124.74 and 59.31

Step by Step Solution

1. Step 1: Write the proportion equation
   90.37 : 124.74 = 59.31 : x
2. Step 2: Convert to fraction form
   90.37/124.74 = 59.31/x
3. Step 3: Cross multiply
   90.37x = 124.74 × 59.31
4. Step 4: Simplify right side
   90.37x = 7,397.71
5. Step 5: Solve for x
   x = 7,397.71/90.37
6. Step 6: Final answer
   x = 81.86