Finding the Fourth Proportional to 2,608.52, 3,908.39 and 1,290.52

Step by Step Solution

1. Step 1: Write the proportion equation
   2,608.52 : 3,908.39 = 1,290.52 : x
2. Step 2: Convert to fraction form
   2,608.52/3,908.39 = 1,290.52/x
3. Step 3: Cross multiply
   2,608.52x = 3,908.39 × 1,290.52
4. Step 4: Simplify right side
   2,608.52x = 5,043,839.24
5. Step 5: Solve for x
   x = 5,043,839.24/2,608.52
6. Step 6: Final answer
   x = 1,933.60