Finding the Fourth Proportional to 2,255.59, 3,112.73 and 1,260.91

Step by Step Solution

1. Step 1: Write the proportion equation
   2,255.59 : 3,112.73 = 1,260.91 : x
2. Step 2: Convert to fraction form
   2,255.59/3,112.73 = 1,260.91/x
3. Step 3: Cross multiply
   2,255.59x = 3,112.73 × 1,260.91
4. Step 4: Simplify right side
   2,255.59x = 3,924,872.38
5. Step 5: Solve for x
   x = 3,924,872.38/2,255.59
6. Step 6: Final answer
   x = 1,740.06