Finding the Fourth Proportional to 2,143.15, 2,957.47 and 1,259.54

Step by Step Solution

1. Step 1: Write the proportion equation
   2,143.15 : 2,957.47 = 1,259.54 : x
2. Step 2: Convert to fraction form
   2,143.15/2,957.47 = 1,259.54/x
3. Step 3: Cross multiply
   2,143.15x = 2,957.47 × 1,259.54
4. Step 4: Simplify right side
   2,143.15x = 3,725,051.76
5. Step 5: Solve for x
   x = 3,725,051.76/2,143.15
6. Step 6: Final answer
   x = 1,738.12