Finding the Fourth Proportional to 1,078,674.57, 1,617,591.31 and 404,388.30

Step by Step Solution

1. Step 1: Write the proportion equation
   1,078,674.57 : 1,617,591.31 = 404,388.30 : x
2. Step 2: Convert to fraction form
   1,078,674.57/1,617,591.31 = 404,388.30/x
3. Step 3: Cross multiply
   1,078,674.57x = 1,617,591.31 × 404,388.30
4. Step 4: Simplify right side
   1,078,674.57x = 654,134,998,176.40
5. Step 5: Solve for x
   x = 654,134,998,176.40/1,078,674.57
6. Step 6: Final answer
   x = 606,424.79