Finding the Fourth Proportional to 2,143.55, 2,958.17 and 1,259.33

Step by Step Solution

1. Step 1: Write the proportion equation
   2,143.55 : 2,958.17 = 1,259.33 : x
2. Step 2: Convert to fraction form
   2,143.55/2,958.17 = 1,259.33/x
3. Step 3: Cross multiply
   2,143.55x = 2,958.17 × 1,259.33
4. Step 4: Simplify right side
   2,143.55x = 3,725,313.32
5. Step 5: Solve for x
   x = 3,725,313.32/2,143.55
6. Step 6: Final answer
   x = 1,737.92