Finding the Third Proportional to 11,221 and 20,618

Step by Step Solution

1. Step 1: Write the proportion equation
   11,221 : 20,618 = 20,618 : x
2. Step 2: Convert to fraction form
   11,221/20,618 = 20,618/x
3. Step 3: Cross multiply
   11,221x = 20,618 × 20,618
4. Step 4: Simplify right side
   11,221x = 425,101,924
5. Step 5: Solve for x
   x = 425,101,924/11,221
6. Step 6: Final answer
   x = 37,884.50