Finding the Fourth Proportional to 726,139.35, 1,002,085.18 and 403,849.59

Step by Step Solution

1. Step 1: Write the proportion equation
   726,139.35 : 1,002,085.18 = 403,849.59 : x
2. Step 2: Convert to fraction form
   726,139.35/1,002,085.18 = 403,849.59/x
3. Step 3: Cross multiply
   726,139.35x = 1,002,085.18 × 403,849.59
4. Step 4: Simplify right side
   726,139.35x = 404,691,684,320.63
5. Step 5: Solve for x
   x = 404,691,684,320.63/726,139.35
6. Step 6: Final answer
   x = 557,319.59