Finding the Fourth Proportional to 2,513.36, 3,771.16 and 871.09

Step by Step Solution

1. Step 1: Write the proportion equation
   2,513.36 : 3,771.16 = 871.09 : x
2. Step 2: Convert to fraction form
   2,513.36/3,771.16 = 871.09/x
3. Step 3: Cross multiply
   2,513.36x = 3,771.16 × 871.09
4. Step 4: Simplify right side
   2,513.36x = 3,285,008.16
5. Step 5: Solve for x
   x = 3,285,008.16/2,513.36
6. Step 6: Final answer
   x = 1,307.02