Finding the Fourth Proportional to 903,788.18, 1,247,185.59 and 495,880.82

Step by Step Solution

1. Step 1: Write the proportion equation
   903,788.18 : 1,247,185.59 = 495,880.82 : x
2. Step 2: Convert to fraction form
   903,788.18/1,247,185.59 = 495,880.82/x
3. Step 3: Cross multiply
   903,788.18x = 1,247,185.59 × 495,880.82
4. Step 4: Simplify right side
   903,788.18x = 618,455,413,061.38
5. Step 5: Solve for x
   x = 618,455,413,061.38/903,788.18
6. Step 6: Final answer
   x = 684,292.43