Finding the Third Proportional to 244,478 and 389,012

Step by Step Solution

1. Step 1: Write the proportion equation
   244,478 : 389,012 = 389,012 : x
2. Step 2: Convert to fraction form
   244,478/389,012 = 389,012/x
3. Step 3: Cross multiply
   244,478x = 389,012 × 389,012
4. Step 4: Simplify right side
   244,478x = 151,330,336,144
5. Step 5: Solve for x
   x = 151,330,336,144/244,478
6. Step 6: Final answer
   x = 618,993.68