Finding the Fourth Proportional to 90,415.56, 124,785.06 and 59,397.30

Step by Step Solution

1. Step 1: Write the proportion equation
   90,415.56 : 124,785.06 = 59,397.30 : x
2. Step 2: Convert to fraction form
   90,415.56/124,785.06 = 59,397.30/x
3. Step 3: Cross multiply
   90,415.56x = 124,785.06 × 59,397.30
4. Step 4: Simplify right side
   90,415.56x = 7,411,895,644.34
5. Step 5: Solve for x
   x = 7,411,895,644.34/90,415.56
6. Step 6: Final answer
   x = 81,975.89