Finding the Fourth Proportional to 2,104.37, 3,156.57 and 871.12

Step by Step Solution

1. Step 1: Write the proportion equation
   2,104.37 : 3,156.57 = 871.12 : x
2. Step 2: Convert to fraction form
   2,104.37/3,156.57 = 871.12/x
3. Step 3: Cross multiply
   2,104.37x = 3,156.57 × 871.12
4. Step 4: Simplify right side
   2,104.37x = 2,749,735.48
5. Step 5: Solve for x
   x = 2,749,735.48/2,104.37
6. Step 6: Final answer
   x = 1,306.68