Finding the Fourth Proportional to 68,978.17, 103,598.46 and 42,865.39

Step by Step Solution

1. Step 1: Write the proportion equation
   68,978.17 : 103,598.46 = 42,865.39 : x
2. Step 2: Convert to fraction form
   68,978.17/103,598.46 = 42,865.39/x
3. Step 3: Cross multiply
   68,978.17x = 103,598.46 × 42,865.39
4. Step 4: Simplify right side
   68,978.17x = 4,440,788,391.30
5. Step 5: Solve for x
   x = 4,440,788,391.30/68,978.17
6. Step 6: Final answer
   x = 64,379.62