Finding the Fourth Proportional to 2,351.72, 3,527.65 and 871.31

Step by Step Solution

1. Step 1: Write the proportion equation
   2,351.72 : 3,527.65 = 871.31 : x
2. Step 2: Convert to fraction form
   2,351.72/3,527.65 = 871.31/x
3. Step 3: Cross multiply
   2,351.72x = 3,527.65 × 871.31
4. Step 4: Simplify right side
   2,351.72x = 3,073,685.77
5. Step 5: Solve for x
   x = 3,073,685.77/2,351.72
6. Step 6: Final answer
   x = 1,306.99