Finding the Fourth Proportional to 2,608.75, 3,601.23 and 1,665.78

Step by Step Solution

1. Step 1: Write the proportion equation
   2,608.75 : 3,601.23 = 1,665.78 : x
2. Step 2: Convert to fraction form
   2,608.75/3,601.23 = 1,665.78/x
3. Step 3: Cross multiply
   2,608.75x = 3,601.23 × 1,665.78
4. Step 4: Simplify right side
   2,608.75x = 5,998,856.91
5. Step 5: Solve for x
   x = 5,998,856.91/2,608.75
6. Step 6: Final answer
   x = 2,299.51