Finding the Fourth Proportional to 2,128,411.59, 3,189,845.02 and 864,761.91

Step by Step Solution

1. Step 1: Write the proportion equation
   2,128,411.59 : 3,189,845.02 = 864,761.91 : x
2. Step 2: Convert to fraction form
   2,128,411.59/3,189,845.02 = 864,761.91/x
3. Step 3: Cross multiply
   2,128,411.59x = 3,189,845.02 × 864,761.91
4. Step 4: Simplify right side
   2,128,411.59x = 2,758,456,459,596.79
5. Step 5: Solve for x
   x = 2,758,456,459,596.79/2,128,411.59
6. Step 6: Final answer
   x = 1,296,016.46