Finding the Third Proportional to 9,612 and 20,205

Step by Step Solution

1. Step 1: Write the proportion equation
   9,612 : 20,205 = 20,205 : x
2. Step 2: Convert to fraction form
   9,612/20,205 = 20,205/x
3. Step 3: Cross multiply
   9,612x = 20,205 × 20,205
4. Step 4: Simplify right side
   9,612x = 408,242,025
5. Step 5: Solve for x
   x = 408,242,025/9,612
6. Step 6: Final answer
   x = 42,472.12