Finding the Fourth Proportional to 92,980.88, 139,392.72 and 40,350.80

Step by Step Solution

1. Step 1: Write the proportion equation
   92,980.88 : 139,392.72 = 40,350.80 : x
2. Step 2: Convert to fraction form
   92,980.88/139,392.72 = 40,350.80/x
3. Step 3: Cross multiply
   92,980.88x = 139,392.72 × 40,350.80
4. Step 4: Simplify right side
   92,980.88x = 5,624,607,766.18
5. Step 5: Solve for x
   x = 5,624,607,766.18/92,980.88
6. Step 6: Final answer
   x = 60,492.09