Finding the Fourth Proportional to 78,520.18, 108,354.75 and 42,710.14

Step by Step Solution

1. Step 1: Write the proportion equation
   78,520.18 : 108,354.75 = 42,710.14 : x
2. Step 2: Convert to fraction form
   78,520.18/108,354.75 = 42,710.14/x
3. Step 3: Cross multiply
   78,520.18x = 108,354.75 × 42,710.14
4. Step 4: Simplify right side
   78,520.18x = 4,627,846,542.17
5. Step 5: Solve for x
   x = 4,627,846,542.17/78,520.18
6. Step 6: Final answer
   x = 58,938.31