Finding the Fourth Proportional to 90,513.72, 135,710.82 and 40,525.38

Step by Step Solution

1. Step 1: Write the proportion equation
   90,513.72 : 135,710.82 = 40,525.38 : x
2. Step 2: Convert to fraction form
   90,513.72/135,710.82 = 40,525.38/x
3. Step 3: Cross multiply
   90,513.72x = 135,710.82 × 40,525.38
4. Step 4: Simplify right side
   90,513.72x = 5,499,732,550.61
5. Step 5: Solve for x
   x = 5,499,732,550.61/90,513.72
6. Step 6: Final answer
   x = 60,761.31