Finding the Fourth Proportional to 897,718.50, 1,238,851.56 and 495,310.50

Step by Step Solution

1. Step 1: Write the proportion equation
   897,718.50 : 1,238,851.56 = 495,310.50 : x
2. Step 2: Convert to fraction form
   897,718.50/1,238,851.56 = 495,310.50/x
3. Step 3: Cross multiply
   897,718.50x = 1,238,851.56 × 495,310.50
4. Step 4: Simplify right side
   897,718.50x = 613,616,185,609.38
5. Step 5: Solve for x
   x = 613,616,185,609.38/897,718.50
6. Step 6: Final answer
   x = 683,528.51