Finding the Fourth Proportional to 726,580.25, 1,002,680.74 and 404,311.10

Step by Step Solution

1. Step 1: Write the proportion equation
   726,580.25 : 1,002,680.74 = 404,311.10 : x
2. Step 2: Convert to fraction form
   726,580.25/1,002,680.74 = 404,311.10/x
3. Step 3: Cross multiply
   726,580.25x = 1,002,680.74 × 404,311.10
4. Step 4: Simplify right side
   726,580.25x = 405,394,946,914.03
5. Step 5: Solve for x
   x = 405,394,946,914.03/726,580.25
6. Step 6: Final answer
   x = 557,949.31