Finding the Third Proportional to 4,206,147 and 9,150,407

Step by Step Solution

1. Step 1: Write the proportion equation
   4,206,147 : 9,150,407 = 9,150,407 : x
2. Step 2: Convert to fraction form
   4,206,147/9,150,407 = 9,150,407/x
3. Step 3: Cross multiply
   4,206,147x = 9,150,407 × 9,150,407
4. Step 4: Simplify right side
   4,206,147x = 83,729,948,265,649
5. Step 5: Solve for x
   x = 83,729,948,265,649/4,206,147
6. Step 6: Final answer
   x = 19,906,567.28