Finding the Fourth Proportional to 2,255.45, 3,112.51 and 1,260.73

Step by Step Solution

1. Step 1: Write the proportion equation
   2,255.45 : 3,112.51 = 1,260.73 : x
2. Step 2: Convert to fraction form
   2,255.45/3,112.51 = 1,260.73/x
3. Step 3: Cross multiply
   2,255.45x = 3,112.51 × 1,260.73
4. Step 4: Simplify right side
   2,255.45x = 3,924,019.17
5. Step 5: Solve for x
   x = 3,924,019.17/2,255.45
6. Step 6: Final answer
   x = 1,739.79