Finding the Fourth Proportional to 2,255.48, 3,112.57 and 1,260.74

Step by Step Solution

1. Step 1: Write the proportion equation
   2,255.48 : 3,112.57 = 1,260.74 : x
2. Step 2: Convert to fraction form
   2,255.48/3,112.57 = 1,260.74/x
3. Step 3: Cross multiply
   2,255.48x = 3,112.57 × 1,260.74
4. Step 4: Simplify right side
   2,255.48x = 3,924,142.94
5. Step 5: Solve for x
   x = 3,924,142.94/2,255.48
6. Step 6: Final answer
   x = 1,739.82