Finding the Fourth Proportional to 2,801,857.55, 4,202,789.49 and 780,105.92

Step by Step Solution

1. Step 1: Write the proportion equation
   2,801,857.55 : 4,202,789.49 = 780,105.92 : x
2. Step 2: Convert to fraction form
   2,801,857.55/4,202,789.49 = 780,105.92/x
3. Step 3: Cross multiply
   2,801,857.55x = 4,202,789.49 × 780,105.92
4. Step 4: Simplify right side
   2,801,857.55x = 3,278,620,940,648.83
5. Step 5: Solve for x
   x = 3,278,620,940,648.83/2,801,857.55
6. Step 6: Final answer
   x = 1,170,159.76