Finding the Fourth Proportional to 726,238.79, 1,002,185.48 and 403,939.79

Step by Step Solution

1. Step 1: Write the proportion equation
   726,238.79 : 1,002,185.48 = 403,939.79 : x
2. Step 2: Convert to fraction form
   726,238.79/1,002,185.48 = 403,939.79/x
3. Step 3: Cross multiply
   726,238.79x = 1,002,185.48 × 403,939.79
4. Step 4: Simplify right side
   726,238.79x = 404,822,585,301.62
5. Step 5: Solve for x
   x = 404,822,585,301.62/726,238.79
6. Step 6: Final answer
   x = 557,423.53