Finding the Third Proportional to 3,669,488 and 8,290,307

Step by Step Solution

1. Step 1: Write the proportion equation
   3,669,488 : 8,290,307 = 8,290,307 : x
2. Step 2: Convert to fraction form
   3,669,488/8,290,307 = 8,290,307/x
3. Step 3: Cross multiply
   3,669,488x = 8,290,307 × 8,290,307
4. Step 4: Simplify right side
   3,669,488x = 68,729,190,154,249
5. Step 5: Solve for x
   x = 68,729,190,154,249/3,669,488
6. Step 6: Final answer
   x = 18,729,912.77