Finding the Fourth Proportional to 2,687.98, 3,709.56 and 1,509.22

Step by Step Solution

1. Step 1: Write the proportion equation
   2,687.98 : 3,709.56 = 1,509.22 : x
2. Step 2: Convert to fraction form
   2,687.98/3,709.56 = 1,509.22/x
3. Step 3: Cross multiply
   2,687.98x = 3,709.56 × 1,509.22
4. Step 4: Simplify right side
   2,687.98x = 5,598,542.14
5. Step 5: Solve for x
   x = 5,598,542.14/2,687.98
6. Step 6: Final answer
   x = 2,082.81