Finding the Third Proportional to 3,910,388 and 8,178,268

Step by Step Solution

1. Step 1: Write the proportion equation
   3,910,388 : 8,178,268 = 8,178,268 : x
2. Step 2: Convert to fraction form
   3,910,388/8,178,268 = 8,178,268/x
3. Step 3: Cross multiply
   3,910,388x = 8,178,268 × 8,178,268
4. Step 4: Simplify right side
   3,910,388x = 66,884,067,479,824
5. Step 5: Solve for x
   x = 66,884,067,479,824/3,910,388
6. Step 6: Final answer
   x = 17,104,202.31