Finding the Third Proportional to 9,985,919 and 21,510,028

Step by Step Solution

1. Step 1: Write the proportion equation
   9,985,919 : 21,510,028 = 21,510,028 : x
2. Step 2: Convert to fraction form
   9,985,919/21,510,028 = 21,510,028/x
3. Step 3: Cross multiply
   9,985,919x = 21,510,028 × 21,510,028
4. Step 4: Simplify right side
   9,985,919x = 462,681,304,560,784
5. Step 5: Solve for x
   x = 462,681,304,560,784/9,985,919
6. Step 6: Final answer
   x = 46,333,372.48