Finding the Third Proportional to 3,859.31 and 7,993.69

Step by Step Solution

1. Step 1: Write the proportion equation
   3,859.31 : 7,993.69 = 7,993.69 : x
2. Step 2: Convert to fraction form
   3,859.31/7,993.69 = 7,993.69/x
3. Step 3: Cross multiply
   3,859.31x = 7,993.69 × 7,993.69
4. Step 4: Simplify right side
   3,859.31x = 63,899,039.85
5. Step 5: Solve for x
   x = 63,899,039.85/3,859.31
6. Step 6: Final answer
   x = 16,557.10