Finding the Third Proportional to 9,778,961 and 21,240,790

Step by Step Solution

1. Step 1: Write the proportion equation
   9,778,961 : 21,240,790 = 21,240,790 : x
2. Step 2: Convert to fraction form
   9,778,961/21,240,790 = 21,240,790/x
3. Step 3: Cross multiply
   9,778,961x = 21,240,790 × 21,240,790
4. Step 4: Simplify right side
   9,778,961x = 451,171,159,824,100
5. Step 5: Solve for x
   x = 451,171,159,824,100/9,778,961
6. Step 6: Final answer
   x = 46,136,921.89