Finding the Fourth Proportional to 2,687.88, 3,709.56 and 1,509.36

Step by Step Solution

1. Step 1: Write the proportion equation
   2,687.88 : 3,709.56 = 1,509.36 : x
2. Step 2: Convert to fraction form
   2,687.88/3,709.56 = 1,509.36/x
3. Step 3: Cross multiply
   2,687.88x = 3,709.56 × 1,509.36
4. Step 4: Simplify right side
   2,687.88x = 5,599,061.48
5. Step 5: Solve for x
   x = 5,599,061.48/2,687.88
6. Step 6: Final answer
   x = 2,083.08