Finding the Fourth Proportional to 1,078,771.88, 1,617,681.20 and 404,380.15

Step by Step Solution

1. Step 1: Write the proportion equation
   1,078,771.88 : 1,617,681.20 = 404,380.15 : x
2. Step 2: Convert to fraction form
   1,078,771.88/1,617,681.20 = 404,380.15/x
3. Step 3: Cross multiply
   1,078,771.88x = 1,617,681.20 × 404,380.15
4. Step 4: Simplify right side
   1,078,771.88x = 654,158,166,308.18
5. Step 5: Solve for x
   x = 654,158,166,308.18/1,078,771.88
6. Step 6: Final answer
   x = 606,391.56