Finding the Third Proportional to 3,393,642 and 7,318,638

Step by Step Solution

1. Step 1: Write the proportion equation
   3,393,642 : 7,318,638 = 7,318,638 : x
2. Step 2: Convert to fraction form
   3,393,642/7,318,638 = 7,318,638/x
3. Step 3: Cross multiply
   3,393,642x = 7,318,638 × 7,318,638
4. Step 4: Simplify right side
   3,393,642x = 53,562,462,175,044
5. Step 5: Solve for x
   x = 53,562,462,175,044/3,393,642
6. Step 6: Final answer
   x = 15,783,179.89