Finding the Fourth Proportional to 726,572.48, 1,002,642.72 and 404,294.72

Step by Step Solution

1. Step 1: Write the proportion equation
   726,572.48 : 1,002,642.72 = 404,294.72 : x
2. Step 2: Convert to fraction form
   726,572.48/1,002,642.72 = 404,294.72/x
3. Step 3: Cross multiply
   726,572.48x = 1,002,642.72 × 404,294.72
4. Step 4: Simplify right side
   726,572.48x = 405,363,157,742.44
5. Step 5: Solve for x
   x = 405,363,157,742.44/726,572.48
6. Step 6: Final answer
   x = 557,911.52