Finding the Third Proportional to 13,618 and 20,607

Step by Step Solution

1. Step 1: Write the proportion equation
   13,618 : 20,607 = 20,607 : x
2. Step 2: Convert to fraction form
   13,618/20,607 = 20,607/x
3. Step 3: Cross multiply
   13,618x = 20,607 × 20,607
4. Step 4: Simplify right side
   13,618x = 424,648,449
5. Step 5: Solve for x
   x = 424,648,449/13,618
6. Step 6: Final answer
   x = 31,182.88