Finding the Fourth Proportional to 92,978.14, 139,463.93 and 40,387.63

Step by Step Solution

1. Step 1: Write the proportion equation
   92,978.14 : 139,463.93 = 40,387.63 : x
2. Step 2: Convert to fraction form
   92,978.14/139,463.93 = 40,387.63/x
3. Step 3: Cross multiply
   92,978.14x = 139,463.93 × 40,387.63
4. Step 4: Simplify right side
   92,978.14x = 5,632,617,355.50
5. Step 5: Solve for x
   x = 5,632,617,355.50/92,978.14
6. Step 6: Final answer
   x = 60,580.02