Finding the Fourth Proportional to 139,766.48, 209,598.96 and 60,861.68

Step by Step Solution

1. Step 1: Write the proportion equation
   139,766.48 : 209,598.96 = 60,861.68 : x
2. Step 2: Convert to fraction form
   139,766.48/209,598.96 = 60,861.68/x
3. Step 3: Cross multiply
   139,766.48x = 209,598.96 × 60,861.68
4. Step 4: Simplify right side
   139,766.48x = 12,756,544,831.85
5. Step 5: Solve for x
   x = 12,756,544,831.85/139,766.48
6. Step 6: Final answer
   x = 91,270.42