Finding the Fourth Proportional to 2,608.05, 3,597.90 and 2,309.60

Step by Step Solution

1. Step 1: Write the proportion equation
   2,608.05 : 3,597.90 = 2,309.60 : x
2. Step 2: Convert to fraction form
   2,608.05/3,597.90 = 2,309.60/x
3. Step 3: Cross multiply
   2,608.05x = 3,597.90 × 2,309.60
4. Step 4: Simplify right side
   2,608.05x = 8,309,712.73
5. Step 5: Solve for x
   x = 8,309,712.73/2,608.05
6. Step 6: Final answer
   x = 3,186.18