Finding the Fourth Proportional to 3,086.71, 4,255.94 and 2,455.31

Step by Step Solution

1. Step 1: Write the proportion equation
   3,086.71 : 4,255.94 = 2,455.31 : x
2. Step 2: Convert to fraction form
   3,086.71/4,255.94 = 2,455.31/x
3. Step 3: Cross multiply
   3,086.71x = 4,255.94 × 2,455.31
4. Step 4: Simplify right side
   3,086.71x = 10,449,668.82
5. Step 5: Solve for x
   x = 10,449,668.82/3,086.71
6. Step 6: Final answer
   x = 3,385.38