Finding the Third Proportional to 3,939.38 and 8,081.25

Step by Step Solution

1. Step 1: Write the proportion equation
   3,939.38 : 8,081.25 = 8,081.25 : x
2. Step 2: Convert to fraction form
   3,939.38/8,081.25 = 8,081.25/x
3. Step 3: Cross multiply
   3,939.38x = 8,081.25 × 8,081.25
4. Step 4: Simplify right side
   3,939.38x = 65,306,601.56
5. Step 5: Solve for x
   x = 65,306,601.56/3,939.38
6. Step 6: Final answer
   x = 16,577.91