Finding the Fourth Proportional to 2,255.69, 3,112.71 and 1,260.75

Step by Step Solution

1. Step 1: Write the proportion equation
   2,255.69 : 3,112.71 = 1,260.75 : x
2. Step 2: Convert to fraction form
   2,255.69/3,112.71 = 1,260.75/x
3. Step 3: Cross multiply
   2,255.69x = 3,112.71 × 1,260.75
4. Step 4: Simplify right side
   2,255.69x = 3,924,349.13
5. Step 5: Solve for x
   x = 3,924,349.13/2,255.69
6. Step 6: Final answer
   x = 1,739.76