Finding the Fourth Proportional to 2,578,034.89, 3,867,249.15 and 781,067.20

Step by Step Solution

1. Step 1: Write the proportion equation
   2,578,034.89 : 3,867,249.15 = 781,067.20 : x
2. Step 2: Convert to fraction form
   2,578,034.89/3,867,249.15 = 781,067.20/x
3. Step 3: Cross multiply
   2,578,034.89x = 3,867,249.15 × 781,067.20
4. Step 4: Simplify right side
   2,578,034.89x = 3,020,581,465,292.88
5. Step 5: Solve for x
   x = 3,020,581,465,292.88/2,578,034.89
6. Step 6: Final answer
   x = 1,171,660.43