Finding the Fourth Proportional to 1,013,508.55, 1,398,641.89 and 554,623.10

Step by Step Solution

1. Step 1: Write the proportion equation
   1,013,508.55 : 1,398,641.89 = 554,623.10 : x
2. Step 2: Convert to fraction form
   1,013,508.55/1,398,641.89 = 554,623.10/x
3. Step 3: Cross multiply
   1,013,508.55x = 1,398,641.89 × 554,623.10
4. Step 4: Simplify right side
   1,013,508.55x = 775,719,103,429.01
5. Step 5: Solve for x
   x = 775,719,103,429.01/1,013,508.55
6. Step 6: Final answer
   x = 765,379.93