Finding the Third Proportional to 7,978,644 and 17,309,992

Step by Step Solution

1. Step 1: Write the proportion equation
   7,978,644 : 17,309,992 = 17,309,992 : x
2. Step 2: Convert to fraction form
   7,978,644/17,309,992 = 17,309,992/x
3. Step 3: Cross multiply
   7,978,644x = 17,309,992 × 17,309,992
4. Step 4: Simplify right side
   7,978,644x = 299,635,823,040,064
5. Step 5: Solve for x
   x = 299,635,823,040,064/7,978,644
6. Step 6: Final answer
   x = 37,554,730.23