Finding the Third Proportional to 8,309,304 and 12,988,836

Step by Step Solution

1. Step 1: Write the proportion equation
   8,309,304 : 12,988,836 = 12,988,836 : x
2. Step 2: Convert to fraction form
   8,309,304/12,988,836 = 12,988,836/x
3. Step 3: Cross multiply
   8,309,304x = 12,988,836 × 12,988,836
4. Step 4: Simplify right side
   8,309,304x = 168,709,860,634,896
5. Step 5: Solve for x
   x = 168,709,860,634,896/8,309,304
6. Step 6: Final answer
   x = 20,303,729.49