Finding the Third Proportional to 2,608.50 and 3,913.88

Step by Step Solution

1. Step 1: Write the proportion equation
   2,608.50 : 3,913.88 = 3,913.88 : x
2. Step 2: Convert to fraction form
   2,608.50/3,913.88 = 3,913.88/x
3. Step 3: Cross multiply
   2,608.50x = 3,913.88 × 3,913.88
4. Step 4: Simplify right side
   2,608.50x = 15,318,417.52
5. Step 5: Solve for x
   x = 15,318,417.52/2,608.50
6. Step 6: Final answer
   x = 5,872.50