Finding the Fourth Proportional to 2,256.26, 3,113.71 and 1,261.55

Step by Step Solution

1. Step 1: Write the proportion equation
   2,256.26 : 3,113.71 = 1,261.55 : x
2. Step 2: Convert to fraction form
   2,256.26/3,113.71 = 1,261.55/x
3. Step 3: Cross multiply
   2,256.26x = 3,113.71 × 1,261.55
4. Step 4: Simplify right side
   2,256.26x = 3,928,085.28
5. Step 5: Solve for x
   x = 3,928,085.28/2,256.26
6. Step 6: Final answer
   x = 1,740.97