Finding the Third Proportional to 3,942.11 and 8,469.88

Step by Step Solution

1. Step 1: Write the proportion equation
   3,942.11 : 8,469.88 = 8,469.88 : x
2. Step 2: Convert to fraction form
   3,942.11/8,469.88 = 8,469.88/x
3. Step 3: Cross multiply
   3,942.11x = 8,469.88 × 8,469.88
4. Step 4: Simplify right side
   3,942.11x = 71,738,848.69
5. Step 5: Solve for x
   x = 71,738,848.69/3,942.11
6. Step 6: Final answer
   x = 18,198.10