Finding the Fourth Proportional to 78,685.50, 108,585.99 and 43,357.50

Step by Step Solution

1. Step 1: Write the proportion equation
   78,685.50 : 108,585.99 = 43,357.50 : x
2. Step 2: Convert to fraction form
   78,685.50/108,585.99 = 43,357.50/x
3. Step 3: Cross multiply
   78,685.50x = 108,585.99 × 43,357.50
4. Step 4: Simplify right side
   78,685.50x = 4,708,017,061.43
5. Step 5: Solve for x
   x = 4,708,017,061.43/78,685.50
6. Step 6: Final answer
   x = 59,833.35