Finding the Fourth Proportional to 90,375, 124,708.56 and 52,138.02

Step by Step Solution

1. Step 1: Write the proportion equation
   90,375 : 124,708.56 = 52,138.02 : x
2. Step 2: Convert to fraction form
   90,375/124,708.56 = 52,138.02/x
3. Step 3: Cross multiply
   90,375x = 124,708.56 × 52,138.02
4. Step 4: Simplify right side
   90,375x = 6,502,057,395.45
5. Step 5: Solve for x
   x = 6,502,057,395.45/90,375
6. Step 6: Final answer
   x = 71,945.31