Finding the Fourth Proportional to 90,104.42, 134,981.67 and 43,390.10

Step by Step Solution

1. Step 1: Write the proportion equation
   90,104.42 : 134,981.67 = 43,390.10 : x
2. Step 2: Convert to fraction form
   90,104.42/134,981.67 = 43,390.10/x
3. Step 3: Cross multiply
   90,104.42x = 134,981.67 × 43,390.10
4. Step 4: Simplify right side
   90,104.42x = 5,856,868,159.47
5. Step 5: Solve for x
   x = 5,856,868,159.47/90,104.42
6. Step 6: Final answer
   x = 65,000.90