Finding the Fourth Proportional to 2,144,356.16, 3,215,820.60 and 864,633.10

Step by Step Solution

1. Step 1: Write the proportion equation
   2,144,356.16 : 3,215,820.60 = 864,633.10 : x
2. Step 2: Convert to fraction form
   2,144,356.16/3,215,820.60 = 864,633.10/x
3. Step 3: Cross multiply
   2,144,356.16x = 3,215,820.60 × 864,633.10
4. Step 4: Simplify right side
   2,144,356.16x = 2,780,504,934,421.86
5. Step 5: Solve for x
   x = 2,780,504,934,421.86/2,144,356.16
6. Step 6: Final answer
   x = 1,296,661.90