Finding the Fourth Proportional to 2,144.30, 2,959.24 and 1,260.39

Step by Step Solution

1. Step 1: Write the proportion equation
   2,144.30 : 2,959.24 = 1,260.39 : x
2. Step 2: Convert to fraction form
   2,144.30/2,959.24 = 1,260.39/x
3. Step 3: Cross multiply
   2,144.30x = 2,959.24 × 1,260.39
4. Step 4: Simplify right side
   2,144.30x = 3,729,786.98
5. Step 5: Solve for x
   x = 3,729,786.98/2,144.30
6. Step 6: Final answer
   x = 1,739.40