Finding the Third Proportional to 3,968.16 and 8,482.78

Step by Step Solution

1. Step 1: Write the proportion equation
   3,968.16 : 8,482.78 = 8,482.78 : x
2. Step 2: Convert to fraction form
   3,968.16/8,482.78 = 8,482.78/x
3. Step 3: Cross multiply
   3,968.16x = 8,482.78 × 8,482.78
4. Step 4: Simplify right side
   3,968.16x = 71,957,577.74
5. Step 5: Solve for x
   x = 71,957,577.74/3,968.16
6. Step 6: Final answer
   x = 18,133.76