Finding the Fourth Proportional to 2,780,508.09, 4,171,156.86 and 861,570.10

Step by Step Solution

1. Step 1: Write the proportion equation
   2,780,508.09 : 4,171,156.86 = 861,570.10 : x
2. Step 2: Convert to fraction form
   2,780,508.09/4,171,156.86 = 861,570.10/x
3. Step 3: Cross multiply
   2,780,508.09x = 4,171,156.86 × 861,570.10
4. Step 4: Simplify right side
   2,780,508.09x = 3,593,744,041,430.72
5. Step 5: Solve for x
   x = 3,593,744,041,430.72/2,780,508.09
6. Step 6: Final answer
   x = 1,292,477.46