Finding the Fourth Proportional to 3,934.24, 5,429.83 and 2,255.31

Step by Step Solution

1. Step 1: Write the proportion equation
   3,934.24 : 5,429.83 = 2,255.31 : x
2. Step 2: Convert to fraction form
   3,934.24/5,429.83 = 2,255.31/x
3. Step 3: Cross multiply
   3,934.24x = 5,429.83 × 2,255.31
4. Step 4: Simplify right side
   3,934.24x = 12,245,949.90
5. Step 5: Solve for x
   x = 12,245,949.90/3,934.24
6. Step 6: Final answer
   x = 3,112.66