Finding the Third Proportional to 9,778,957 and 21,240,782

Step by Step Solution

1. Step 1: Write the proportion equation
   9,778,957 : 21,240,782 = 21,240,782 : x
2. Step 2: Convert to fraction form
   9,778,957/21,240,782 = 21,240,782/x
3. Step 3: Cross multiply
   9,778,957x = 21,240,782 × 21,240,782
4. Step 4: Simplify right side
   9,778,957x = 451,170,819,971,524
5. Step 5: Solve for x
   x = 451,170,819,971,524/9,778,957
6. Step 6: Final answer
   x = 46,136,906.01