Finding the Third Proportional to 9,778,948 and 21,240,766

Step by Step Solution

1. Step 1: Write the proportion equation
   9,778,948 : 21,240,766 = 21,240,766 : x
2. Step 2: Convert to fraction form
   9,778,948/21,240,766 = 21,240,766/x
3. Step 3: Cross multiply
   9,778,948x = 21,240,766 × 21,240,766
4. Step 4: Simplify right side
   9,778,948x = 451,170,140,266,756
5. Step 5: Solve for x
   x = 451,170,140,266,756/9,778,948
6. Step 6: Final answer
   x = 46,136,878.96