Finding the Third Proportional to 8,491,139 and 17,940,678

Step by Step Solution

1. Step 1: Write the proportion equation
   8,491,139 : 17,940,678 = 17,940,678 : x
2. Step 2: Convert to fraction form
   8,491,139/17,940,678 = 17,940,678/x
3. Step 3: Cross multiply
   8,491,139x = 17,940,678 × 17,940,678
4. Step 4: Simplify right side
   8,491,139x = 321,867,927,099,684
5. Step 5: Solve for x
   x = 321,867,927,099,684/8,491,139
6. Step 6: Final answer
   x = 37,906,331.19