Finding the Fourth Proportional to 2,410.72, 3,615.36 and 871.36

Step by Step Solution

1. Step 1: Write the proportion equation
   2,410.72 : 3,615.36 = 871.36 : x
2. Step 2: Convert to fraction form
   2,410.72/3,615.36 = 871.36/x
3. Step 3: Cross multiply
   2,410.72x = 3,615.36 × 871.36
4. Step 4: Simplify right side
   2,410.72x = 3,150,280.09
5. Step 5: Solve for x
   x = 3,150,280.09/2,410.72
6. Step 6: Final answer
   x = 1,306.78