Finding the Fourth Proportional to 2,144,355.16, 3,215,819.10 and 864,632.10

Step by Step Solution

1. Step 1: Write the proportion equation
   2,144,355.16 : 3,215,819.10 = 864,632.10 : x
2. Step 2: Convert to fraction form
   2,144,355.16/3,215,819.10 = 864,632.10/x
3. Step 3: Cross multiply
   2,144,355.16x = 3,215,819.10 × 864,632.10
4. Step 4: Simplify right side
   2,144,355.16x = 2,780,500,421,653.11
5. Step 5: Solve for x
   x = 2,780,500,421,653.11/2,144,355.16
6. Step 6: Final answer
   x = 1,296,660.40