Finding the Fourth Proportional to 2,143.32, 2,957.76 and 1,259.76

Step by Step Solution

1. Step 1: Write the proportion equation
   2,143.32 : 2,957.76 = 1,259.76 : x
2. Step 2: Convert to fraction form
   2,143.32/2,957.76 = 1,259.76/x
3. Step 3: Cross multiply
   2,143.32x = 2,957.76 × 1,259.76
4. Step 4: Simplify right side
   2,143.32x = 3,726,067.74
5. Step 5: Solve for x
   x = 3,726,067.74/2,143.32
6. Step 6: Final answer
   x = 1,738.46