Finding the Fourth Proportional to 2,059,443.20, 3,086,707.20 and 861,363.20

Step by Step Solution

1. Step 1: Write the proportion equation
   2,059,443.20 : 3,086,707.20 = 861,363.20 : x
2. Step 2: Convert to fraction form
   2,059,443.20/3,086,707.20 = 861,363.20/x
3. Step 3: Cross multiply
   2,059,443.20x = 3,086,707.20 × 861,363.20
4. Step 4: Simplify right side
   2,059,443.20x = 2,658,775,991,255.04
5. Step 5: Solve for x
   x = 2,658,775,991,255.04/2,059,443.20
6. Step 6: Final answer
   x = 1,291,016.91