Finding the Fourth Proportional to 2,103.39, 3,152.91 and 871.47

Step by Step Solution

1. Step 1: Write the proportion equation
   2,103.39 : 3,152.91 = 871.47 : x
2. Step 2: Convert to fraction form
   2,103.39/3,152.91 = 871.47/x
3. Step 3: Cross multiply
   2,103.39x = 3,152.91 × 871.47
4. Step 4: Simplify right side
   2,103.39x = 2,747,666.48
5. Step 5: Solve for x
   x = 2,747,666.48/2,103.39
6. Step 6: Final answer
   x = 1,306.30