Finding the Fourth Proportional to 2,514.50, 3,771.79 and 871.09

Step by Step Solution

1. Step 1: Write the proportion equation
   2,514.50 : 3,771.79 = 871.09 : x
2. Step 2: Convert to fraction form
   2,514.50/3,771.79 = 871.09/x
3. Step 3: Cross multiply
   2,514.50x = 3,771.79 × 871.09
4. Step 4: Simplify right side
   2,514.50x = 3,285,564.20
5. Step 5: Solve for x
   x = 3,285,564.20/2,514.50
6. Step 6: Final answer
   x = 1,306.65