Finding the Fourth Proportional to 8,451.57, 12,678.80 and 2,608.05

Step by Step Solution

1. Step 1: Write the proportion equation
   8,451.57 : 12,678.80 = 2,608.05 : x
2. Step 2: Convert to fraction form
   8,451.57/12,678.80 = 2,608.05/x
3. Step 3: Cross multiply
   8,451.57x = 12,678.80 × 2,608.05
4. Step 4: Simplify right side
   8,451.57x = 33,066,931.30
5. Step 5: Solve for x
   x = 33,066,931.30/8,451.57
6. Step 6: Final answer
   x = 3,912.52