Finding the Fourth Proportional to 2,586.17, 3,859.39 and 2,309.37

Step by Step Solution

1. Step 1: Write the proportion equation
   2,586.17 : 3,859.39 = 2,309.37 : x
2. Step 2: Convert to fraction form
   2,586.17/3,859.39 = 2,309.37/x
3. Step 3: Cross multiply
   2,586.17x = 3,859.39 × 2,309.37
4. Step 4: Simplify right side
   2,586.17x = 8,912,759.48
5. Step 5: Solve for x
   x = 8,912,759.48/2,586.17
6. Step 6: Final answer
   x = 3,446.32