Finding the Fourth Proportional to 2,128,411.62, 3,189,845.07 and 864,761.94

Step by Step Solution

1. Step 1: Write the proportion equation
   2,128,411.62 : 3,189,845.07 = 864,761.94 : x
2. Step 2: Convert to fraction form
   2,128,411.62/3,189,845.07 = 864,761.94/x
3. Step 3: Cross multiply
   2,128,411.62x = 3,189,845.07 × 864,761.94
4. Step 4: Simplify right side
   2,128,411.62x = 2,758,456,606,708.83
5. Step 5: Solve for x
   x = 2,758,456,606,708.83/2,128,411.62
6. Step 6: Final answer
   x = 1,296,016.51