Finding the Fourth Proportional to 2,608.16, 3,908.72 and 1,310.56

Step by Step Solution

1. Step 1: Write the proportion equation
   2,608.16 : 3,908.72 = 1,310.56 : x
2. Step 2: Convert to fraction form
   2,608.16/3,908.72 = 1,310.56/x
3. Step 3: Cross multiply
   2,608.16x = 3,908.72 × 1,310.56
4. Step 4: Simplify right side
   2,608.16x = 5,122,612.08
5. Step 5: Solve for x
   x = 5,122,612.08/2,608.16
6. Step 6: Final answer
   x = 1,964.07