Finding the Third Proportional to 7,797,978 and 17,388,942

Step by Step Solution

1. Step 1: Write the proportion equation
   7,797,978 : 17,388,942 = 17,388,942 : x
2. Step 2: Convert to fraction form
   7,797,978/17,388,942 = 17,388,942/x
3. Step 3: Cross multiply
   7,797,978x = 17,388,942 × 17,388,942
4. Step 4: Simplify right side
   7,797,978x = 302,375,303,879,364
5. Step 5: Solve for x
   x = 302,375,303,879,364/7,797,978
6. Step 6: Final answer
   x = 38,776,116.56