Finding the Fourth Proportional to 897,728, 1,238,890.56 and 495,345.92

Step by Step Solution

1. Step 1: Write the proportion equation
   897,728 : 1,238,890.56 = 495,345.92 : x
2. Step 2: Convert to fraction form
   897,728/1,238,890.56 = 495,345.92/x
3. Step 3: Cross multiply
   897,728x = 1,238,890.56 × 495,345.92
4. Step 4: Simplify right side
   897,728x = 613,679,384,222.52
5. Step 5: Solve for x
   x = 613,679,384,222.52/897,728
6. Step 6: Final answer
   x = 683,591.67