Finding the Third Proportional to 4,206,144 and 9,150,399

Step by Step Solution

1. Step 1: Write the proportion equation
   4,206,144 : 9,150,399 = 9,150,399 : x
2. Step 2: Convert to fraction form
   4,206,144/9,150,399 = 9,150,399/x
3. Step 3: Cross multiply
   4,206,144x = 9,150,399 × 9,150,399
4. Step 4: Simplify right side
   4,206,144x = 83,729,801,859,201
5. Step 5: Solve for x
   x = 83,729,801,859,201/4,206,144
6. Step 6: Final answer
   x = 19,906,546.68