Finding the Fourth Proportional to 2,128,414.50, 3,189,849.38 and 864,764.82

Step by Step Solution

1. Step 1: Write the proportion equation
   2,128,414.50 : 3,189,849.38 = 864,764.82 : x
2. Step 2: Convert to fraction form
   2,128,414.50/3,189,849.38 = 864,764.82/x
3. Step 3: Cross multiply
   2,128,414.50x = 3,189,849.38 × 864,764.82
4. Step 4: Simplify right side
   2,128,414.50x = 2,758,469,520,598.99
5. Step 5: Solve for x
   x = 2,758,469,520,598.99/2,128,414.50
6. Step 6: Final answer
   x = 1,296,020.83