Finding the Fourth Proportional to 2,508.39, 3,762.89 and 865.31

Step by Step Solution

1. Step 1: Write the proportion equation
   2,508.39 : 3,762.89 = 865.31 : x
2. Step 2: Convert to fraction form
   2,508.39/3,762.89 = 865.31/x
3. Step 3: Cross multiply
   2,508.39x = 3,762.89 × 865.31
4. Step 4: Simplify right side
   2,508.39x = 3,256,043.20
5. Step 5: Solve for x
   x = 3,256,043.20/2,508.39
6. Step 6: Final answer
   x = 1,298.06