Finding the Fourth Proportional to 2,254.79, 3,111.60 and 1,260.07

Step by Step Solution

1. Step 1: Write the proportion equation
   2,254.79 : 3,111.60 = 1,260.07 : x
2. Step 2: Convert to fraction form
   2,254.79/3,111.60 = 1,260.07/x
3. Step 3: Cross multiply
   2,254.79x = 3,111.60 × 1,260.07
4. Step 4: Simplify right side
   2,254.79x = 3,920,833.81
5. Step 5: Solve for x
   x = 3,920,833.81/2,254.79
6. Step 6: Final answer
   x = 1,738.89