Finding the Fourth Proportional to 2,098.56, 3,147.86 and 865.12

Step by Step Solution

1. Step 1: Write the proportion equation
   2,098.56 : 3,147.86 = 865.12 : x
2. Step 2: Convert to fraction form
   2,098.56/3,147.86 = 865.12/x
3. Step 3: Cross multiply
   2,098.56x = 3,147.86 × 865.12
4. Step 4: Simplify right side
   2,098.56x = 2,723,276.64
5. Step 5: Solve for x
   x = 2,723,276.64/2,098.56
6. Step 6: Final answer
   x = 1,297.69