Finding the Third Proportional to 13,728 and 30,618

Step by Step Solution

1. Step 1: Write the proportion equation
   13,728 : 30,618 = 30,618 : x
2. Step 2: Convert to fraction form
   13,728/30,618 = 30,618/x
3. Step 3: Cross multiply
   13,728x = 30,618 × 30,618
4. Step 4: Simplify right side
   13,728x = 937,461,924
5. Step 5: Solve for x
   x = 937,461,924/13,728
6. Step 6: Final answer
   x = 68,288.31