Finding the Fourth Proportional to 2,255.58, 3,112.71 and 1,260.87

Step by Step Solution

1. Step 1: Write the proportion equation
   2,255.58 : 3,112.71 = 1,260.87 : x
2. Step 2: Convert to fraction form
   2,255.58/3,112.71 = 1,260.87/x
3. Step 3: Cross multiply
   2,255.58x = 3,112.71 × 1,260.87
4. Step 4: Simplify right side
   2,255.58x = 3,924,722.66
5. Step 5: Solve for x
   x = 3,924,722.66/2,255.58
6. Step 6: Final answer
   x = 1,740.01