Finding the Fourth Proportional to 922,123.50, 1,272,569.31 and 519,715.50

Step by Step Solution

1. Step 1: Write the proportion equation
   922,123.50 : 1,272,569.31 = 519,715.50 : x
2. Step 2: Convert to fraction form
   922,123.50/1,272,569.31 = 519,715.50/x
3. Step 3: Cross multiply
   922,123.50x = 1,272,569.31 × 519,715.50
4. Step 4: Simplify right side
   922,123.50x = 661,373,995,231.31
5. Step 5: Solve for x
   x = 661,373,995,231.31/922,123.50
6. Step 6: Final answer
   x = 717,229.30