Finding the Fourth Proportional to 2,608.89, 3,910.69 and 1,635.67

Step by Step Solution

1. Step 1: Write the proportion equation
   2,608.89 : 3,910.69 = 1,635.67 : x
2. Step 2: Convert to fraction form
   2,608.89/3,910.69 = 1,635.67/x
3. Step 3: Cross multiply
   2,608.89x = 3,910.69 × 1,635.67
4. Step 4: Simplify right side
   2,608.89x = 6,396,598.31
5. Step 5: Solve for x
   x = 6,396,598.31/2,608.89
6. Step 6: Final answer
   x = 2,451.85