Finding the Third Proportional to 3,318,778 and 7,280,372

Step by Step Solution

1. Step 1: Write the proportion equation
   3,318,778 : 7,280,372 = 7,280,372 : x
2. Step 2: Convert to fraction form
   3,318,778/7,280,372 = 7,280,372/x
3. Step 3: Cross multiply
   3,318,778x = 7,280,372 × 7,280,372
4. Step 4: Simplify right side
   3,318,778x = 53,003,816,458,384
5. Step 5: Solve for x
   x = 53,003,816,458,384/3,318,778
6. Step 6: Final answer
   x = 15,970,883.40