Finding the Fourth Proportional to 68,815.98, 103,057.72 and 39,143.86

Step by Step Solution

1. Step 1: Write the proportion equation
   68,815.98 : 103,057.72 = 39,143.86 : x
2. Step 2: Convert to fraction form
   68,815.98/103,057.72 = 39,143.86/x
3. Step 3: Cross multiply
   68,815.98x = 103,057.72 × 39,143.86
4. Step 4: Simplify right side
   68,815.98x = 4,034,076,608.10
5. Step 5: Solve for x
   x = 4,034,076,608.10/68,815.98
6. Step 6: Final answer
   x = 58,621.22