Finding the Fourth Proportional to 274,456.88, 412,063.12 and 139,612.24

Step by Step Solution

1. Step 1: Write the proportion equation
   274,456.88 : 412,063.12 = 139,612.24 : x
2. Step 2: Convert to fraction form
   274,456.88/412,063.12 = 139,612.24/x
3. Step 3: Cross multiply
   274,456.88x = 412,063.12 × 139,612.24
4. Step 4: Simplify right side
   274,456.88x = 57,529,055,204.59
5. Step 5: Solve for x
   x = 57,529,055,204.59/274,456.88
6. Step 6: Final answer
   x = 209,610.54