Finding the Fourth Proportional to 2,143.34, 2,956.56 and 1,258.97

Step by Step Solution

1. Step 1: Write the proportion equation
   2,143.34 : 2,956.56 = 1,258.97 : x
2. Step 2: Convert to fraction form
   2,143.34/2,956.56 = 1,258.97/x
3. Step 3: Cross multiply
   2,143.34x = 2,956.56 × 1,258.97
4. Step 4: Simplify right side
   2,143.34x = 3,722,205.56
5. Step 5: Solve for x
   x = 3,722,205.56/2,143.34
6. Step 6: Final answer
   x = 1,736.64