Finding the Third Proportional to 3,910.15 and 8,144.30

Step by Step Solution

1. Step 1: Write the proportion equation
   3,910.15 : 8,144.30 = 8,144.30 : x
2. Step 2: Convert to fraction form
   3,910.15/8,144.30 = 8,144.30/x
3. Step 3: Cross multiply
   3,910.15x = 8,144.30 × 8,144.30
4. Step 4: Simplify right side
   3,910.15x = 66,329,571.59
5. Step 5: Solve for x
   x = 66,329,571.59/3,910.15
6. Step 6: Final answer
   x = 16,963.44