Finding the Fourth Proportional to 2,514.51, 3,771.41 and 871.20

Step by Step Solution

1. Step 1: Write the proportion equation
   2,514.51 : 3,771.41 = 871.20 : x
2. Step 2: Convert to fraction form
   2,514.51/3,771.41 = 871.20/x
3. Step 3: Cross multiply
   2,514.51x = 3,771.41 × 871.20
4. Step 4: Simplify right side
   2,514.51x = 3,285,648.04
5. Step 5: Solve for x
   x = 3,285,648.04/2,514.51
6. Step 6: Final answer
   x = 1,306.68