Finding the Fourth Proportional to 78,387, 108,174.38 and 42,577.61

Step by Step Solution

1. Step 1: Write the proportion equation
   78,387 : 108,174.38 = 42,577.61 : x
2. Step 2: Convert to fraction form
   78,387/108,174.38 = 42,577.61/x
3. Step 3: Cross multiply
   78,387x = 108,174.38 × 42,577.61
4. Step 4: Simplify right side
   78,387x = 4,605,806,563.63
5. Step 5: Solve for x
   x = 4,605,806,563.63/78,387
6. Step 6: Final answer
   x = 58,757.28