Finding the Fourth Proportional to 90,643.50, 135,868.05 and 43,793.10

Step by Step Solution

1. Step 1: Write the proportion equation
   90,643.50 : 135,868.05 = 43,793.10 : x
2. Step 2: Convert to fraction form
   90,643.50/135,868.05 = 43,793.10/x
3. Step 3: Cross multiply
   90,643.50x = 135,868.05 × 43,793.10
4. Step 4: Simplify right side
   90,643.50x = 5,950,083,100.46
5. Step 5: Solve for x
   x = 5,950,083,100.46/90,643.50
6. Step 6: Final answer
   x = 65,642.69