Finding the Fourth Proportional to 2,144.80, 2,959.89 and 1,260.59

Step by Step Solution

1. Step 1: Write the proportion equation
   2,144.80 : 2,959.89 = 1,260.59 : x
2. Step 2: Convert to fraction form
   2,144.80/2,959.89 = 1,260.59/x
3. Step 3: Cross multiply
   2,144.80x = 2,959.89 × 1,260.59
4. Step 4: Simplify right side
   2,144.80x = 3,731,192.94
5. Step 5: Solve for x
   x = 3,731,192.94/2,144.80
6. Step 6: Final answer
   x = 1,739.65