Finding the Fourth Proportional to 3,965.57, 5,471.97 and 2,287.04

Step by Step Solution

1. Step 1: Write the proportion equation
   3,965.57 : 5,471.97 = 2,287.04 : x
2. Step 2: Convert to fraction form
   3,965.57/5,471.97 = 2,287.04/x
3. Step 3: Cross multiply
   3,965.57x = 5,471.97 × 2,287.04
4. Step 4: Simplify right side
   3,965.57x = 12,514,614.27
5. Step 5: Solve for x
   x = 12,514,614.27/3,965.57
6. Step 6: Final answer
   x = 3,155.82