Finding the Fourth Proportional to 2,255.72, 3,112.56 and 1,260.81

Step by Step Solution

1. Step 1: Write the proportion equation
   2,255.72 : 3,112.56 = 1,260.81 : x
2. Step 2: Convert to fraction form
   2,255.72/3,112.56 = 1,260.81/x
3. Step 3: Cross multiply
   2,255.72x = 3,112.56 × 1,260.81
4. Step 4: Simplify right side
   2,255.72x = 3,924,346.77
5. Step 5: Solve for x
   x = 3,924,346.77/2,255.72
6. Step 6: Final answer
   x = 1,739.74