Finding the Fourth Proportional to 2,097.15, 3,147.17 and 864.56

Step by Step Solution

1. Step 1: Write the proportion equation
   2,097.15 : 3,147.17 = 864.56 : x
2. Step 2: Convert to fraction form
   2,097.15/3,147.17 = 864.56/x
3. Step 3: Cross multiply
   2,097.15x = 3,147.17 × 864.56
4. Step 4: Simplify right side
   2,097.15x = 2,720,917.30
5. Step 5: Solve for x
   x = 2,720,917.30/2,097.15
6. Step 6: Final answer
   x = 1,297.44