Finding the Third Proportional to 9,778,968 and 21,240,804

Step by Step Solution

1. Step 1: Write the proportion equation
   9,778,968 : 21,240,804 = 21,240,804 : x
2. Step 2: Convert to fraction form
   9,778,968/21,240,804 = 21,240,804/x
3. Step 3: Cross multiply
   9,778,968x = 21,240,804 × 21,240,804
4. Step 4: Simplify right side
   9,778,968x = 451,171,754,566,416
5. Step 5: Solve for x
   x = 451,171,754,566,416/9,778,968
6. Step 6: Final answer
   x = 46,136,949.68