Finding the Third Proportional to 6,642 and 12,213

Step by Step Solution

1. Step 1: Write the proportion equation
   6,642 : 12,213 = 12,213 : x
2. Step 2: Convert to fraction form
   6,642/12,213 = 12,213/x
3. Step 3: Cross multiply
   6,642x = 12,213 × 12,213
4. Step 4: Simplify right side
   6,642x = 149,157,369
5. Step 5: Solve for x
   x = 149,157,369/6,642
6. Step 6: Final answer
   x = 22,456.70