Finding the Fourth Proportional to 1,013,581.17, 1,398,681.72 and 554,604.18

Step by Step Solution

1. Step 1: Write the proportion equation
   1,013,581.17 : 1,398,681.72 = 554,604.18 : x
2. Step 2: Convert to fraction form
   1,013,581.17/1,398,681.72 = 554,604.18/x
3. Step 3: Cross multiply
   1,013,581.17x = 1,398,681.72 × 554,604.18
4. Step 4: Simplify right side
   1,013,581.17x = 775,714,728,401.59
5. Step 5: Solve for x
   x = 775,714,728,401.59/1,013,581.17
6. Step 6: Final answer
   x = 765,320.78