Finding the Third Proportional to 244,012 and 389,618

Step by Step Solution

1. Step 1: Write the proportion equation
   244,012 : 389,618 = 389,618 : x
2. Step 2: Convert to fraction form
   244,012/389,618 = 389,618/x
3. Step 3: Cross multiply
   244,012x = 389,618 × 389,618
4. Step 4: Simplify right side
   244,012x = 151,802,185,924
5. Step 5: Solve for x
   x = 151,802,185,924/244,012
6. Step 6: Final answer
   x = 622,109.51