Finding the Fourth Proportional to 2,256.12, 3,113.39 and 1,261.49

Step by Step Solution

1. Step 1: Write the proportion equation
   2,256.12 : 3,113.39 = 1,261.49 : x
2. Step 2: Convert to fraction form
   2,256.12/3,113.39 = 1,261.49/x
3. Step 3: Cross multiply
   2,256.12x = 3,113.39 × 1,261.49
4. Step 4: Simplify right side
   2,256.12x = 3,927,504.04
5. Step 5: Solve for x
   x = 3,927,504.04/2,256.12
6. Step 6: Final answer
   x = 1,740.82