Finding the Fourth Proportional to 90,105.42, 134,983.17 and 43,391.10

Step by Step Solution

1. Step 1: Write the proportion equation
   90,105.42 : 134,983.17 = 43,391.10 : x
2. Step 2: Convert to fraction form
   90,105.42/134,983.17 = 43,391.10/x
3. Step 3: Cross multiply
   90,105.42x = 134,983.17 × 43,391.10
4. Step 4: Simplify right side
   90,105.42x = 5,857,068,227.79
5. Step 5: Solve for x
   x = 5,857,068,227.79/90,105.42
6. Step 6: Final answer
   x = 65,002.40