Finding the Fourth Proportional to 3,057.52, 4,585.69 and 865.72

Step by Step Solution

1. Step 1: Write the proportion equation
   3,057.52 : 4,585.69 = 865.72 : x
2. Step 2: Convert to fraction form
   3,057.52/4,585.69 = 865.72/x
3. Step 3: Cross multiply
   3,057.52x = 4,585.69 × 865.72
4. Step 4: Simplify right side
   3,057.52x = 3,969,923.55
5. Step 5: Solve for x
   x = 3,969,923.55/3,057.52
6. Step 6: Final answer
   x = 1,298.41