Finding the Fourth Proportional to 2,327.55, 3,490.42 and 865.91

Step by Step Solution

1. Step 1: Write the proportion equation
   2,327.55 : 3,490.42 = 865.91 : x
2. Step 2: Convert to fraction form
   2,327.55/3,490.42 = 865.91/x
3. Step 3: Cross multiply
   2,327.55x = 3,490.42 × 865.91
4. Step 4: Simplify right side
   2,327.55x = 3,022,378.69
5. Step 5: Solve for x
   x = 3,022,378.69/2,327.55
6. Step 6: Final answer
   x = 1,298.52