Finding the Fourth Proportional to 2,410.86, 3,615.57 and 871.50

Step by Step Solution

1. Step 1: Write the proportion equation
   2,410.86 : 3,615.57 = 871.50 : x
2. Step 2: Convert to fraction form
   2,410.86/3,615.57 = 871.50/x
3. Step 3: Cross multiply
   2,410.86x = 3,615.57 × 871.50
4. Step 4: Simplify right side
   2,410.86x = 3,150,969.26
5. Step 5: Solve for x
   x = 3,150,969.26/2,410.86
6. Step 6: Final answer
   x = 1,306.99