Finding the Fourth Proportional to 2,255.71, 3,378.77 and 1,281.31

Step by Step Solution

1. Step 1: Write the proportion equation
   2,255.71 : 3,378.77 = 1,281.31 : x
2. Step 2: Convert to fraction form
   2,255.71/3,378.77 = 1,281.31/x
3. Step 3: Cross multiply
   2,255.71x = 3,378.77 × 1,281.31
4. Step 4: Simplify right side
   2,255.71x = 4,329,245.38
5. Step 5: Solve for x
   x = 4,329,245.38/2,255.71
6. Step 6: Final answer
   x = 1,919.24