Finding the Fourth Proportional to 2,254.78, 3,111.70 and 1,260.15

Step by Step Solution

1. Step 1: Write the proportion equation
   2,254.78 : 3,111.70 = 1,260.15 : x
2. Step 2: Convert to fraction form
   2,254.78/3,111.70 = 1,260.15/x
3. Step 3: Cross multiply
   2,254.78x = 3,111.70 × 1,260.15
4. Step 4: Simplify right side
   2,254.78x = 3,921,208.76
5. Step 5: Solve for x
   x = 3,921,208.76/2,254.78
6. Step 6: Final answer
   x = 1,739.06