Finding the Fourth Proportional to 2,255.04, 3,111.98 and 1,260.40

Step by Step Solution

1. Step 1: Write the proportion equation
   2,255.04 : 3,111.98 = 1,260.40 : x
2. Step 2: Convert to fraction form
   2,255.04/3,111.98 = 1,260.40/x
3. Step 3: Cross multiply
   2,255.04x = 3,111.98 × 1,260.40
4. Step 4: Simplify right side
   2,255.04x = 3,922,339.59
5. Step 5: Solve for x
   x = 3,922,339.59/2,255.04
6. Step 6: Final answer
   x = 1,739.37