Finding the Fourth Proportional to 144,356.72, 216,479.60 and 49,569.28

Step by Step Solution

1. Step 1: Write the proportion equation
   144,356.72 : 216,479.60 = 49,569.28 : x
2. Step 2: Convert to fraction form
   144,356.72/216,479.60 = 49,569.28/x
3. Step 3: Cross multiply
   144,356.72x = 216,479.60 × 49,569.28
4. Step 4: Simplify right side
   144,356.72x = 10,730,737,906.69
5. Step 5: Solve for x
   x = 10,730,737,906.69/144,356.72
6. Step 6: Final answer
   x = 74,334.87