Finding the Fourth Proportional to 2,114.46, 3,171.56 and 865.58

Step by Step Solution

1. Step 1: Write the proportion equation
   2,114.46 : 3,171.56 = 865.58 : x
2. Step 2: Convert to fraction form
   2,114.46/3,171.56 = 865.58/x
3. Step 3: Cross multiply
   2,114.46x = 3,171.56 × 865.58
4. Step 4: Simplify right side
   2,114.46x = 2,745,218.72
5. Step 5: Solve for x
   x = 2,745,218.72/2,114.46
6. Step 6: Final answer
   x = 1,298.31