Finding the Fourth Proportional to 2,258.72, 3,385.76 and 871.68

Step by Step Solution

1. Step 1: Write the proportion equation
   2,258.72 : 3,385.76 = 871.68 : x
2. Step 2: Convert to fraction form
   2,258.72/3,385.76 = 871.68/x
3. Step 3: Cross multiply
   2,258.72x = 3,385.76 × 871.68
4. Step 4: Simplify right side
   2,258.72x = 2,951,299.28
5. Step 5: Solve for x
   x = 2,951,299.28/2,258.72
6. Step 6: Final answer
   x = 1,306.62