Finding the Fourth Proportional to 78,915.38, 108,902.57 and 43,105.40

Step by Step Solution

1. Step 1: Write the proportion equation
   78,915.38 : 108,902.57 = 43,105.40 : x
2. Step 2: Convert to fraction form
   78,915.38/108,902.57 = 43,105.40/x
3. Step 3: Cross multiply
   78,915.38x = 108,902.57 × 43,105.40
4. Step 4: Simplify right side
   78,915.38x = 4,694,288,404.13
5. Step 5: Solve for x
   x = 4,694,288,404.13/78,915.38
6. Step 6: Final answer
   x = 59,485.09