Finding the Third Proportional to 2,680.88 and 3,939.75

Step by Step Solution

1. Step 1: Write the proportion equation
   2,680.88 : 3,939.75 = 3,939.75 : x
2. Step 2: Convert to fraction form
   2,680.88/3,939.75 = 3,939.75/x
3. Step 3: Cross multiply
   2,680.88x = 3,939.75 × 3,939.75
4. Step 4: Simplify right side
   2,680.88x = 15,521,630.06
5. Step 5: Solve for x
   x = 15,521,630.06/2,680.88
6. Step 6: Final answer
   x = 5,789.76