Finding the Third Proportional to 80,485,449 and 174,581,678

Step by Step Solution

1. Step 1: Write the proportion equation
   80,485,449 : 174,581,678 = 174,581,678 : x
2. Step 2: Convert to fraction form
   80,485,449/174,581,678 = 174,581,678/x
3. Step 3: Cross multiply
   80,485,449x = 174,581,678 × 174,581,678
4. Step 4: Simplify right side
   80,485,449x = 30,478,762,293,295,684
5. Step 5: Solve for x
   x = 30,478,762,293,295,684/80,485,449
6. Step 6: Final answer
   x = 378,686,615.68