Finding the Third Proportional to 12,212 and 18,648

Step by Step Solution

1. Step 1: Write the proportion equation
   12,212 : 18,648 = 18,648 : x
2. Step 2: Convert to fraction form
   12,212/18,648 = 18,648/x
3. Step 3: Cross multiply
   12,212x = 18,648 × 18,648
4. Step 4: Simplify right side
   12,212x = 347,747,904
5. Step 5: Solve for x
   x = 347,747,904/12,212
6. Step 6: Final answer
   x = 28,475.92