Finding the Fourth Proportional to 139,520.94, 209,276.71 and 60,635.17

Step by Step Solution

1. Step 1: Write the proportion equation
   139,520.94 : 209,276.71 = 60,635.17 : x
2. Step 2: Convert to fraction form
   139,520.94/209,276.71 = 60,635.17/x
3. Step 3: Cross multiply
   139,520.94x = 209,276.71 × 60,635.17
4. Step 4: Simplify right side
   139,520.94x = 12,689,528,887.89
5. Step 5: Solve for x
   x = 12,689,528,887.89/139,520.94
6. Step 6: Final answer
   x = 90,950.72