Finding the Fourth Proportional to 2,104.15, 3,156.27 and 871.23

Step by Step Solution

1. Step 1: Write the proportion equation
   2,104.15 : 3,156.27 = 871.23 : x
2. Step 2: Convert to fraction form
   2,104.15/3,156.27 = 871.23/x
3. Step 3: Cross multiply
   2,104.15x = 3,156.27 × 871.23
4. Step 4: Simplify right side
   2,104.15x = 2,749,828.54
5. Step 5: Solve for x
   x = 2,749,828.54/2,104.15
6. Step 6: Final answer
   x = 1,306.86