Finding the Third Proportional to 4,171,951 and 8,663,648

Step by Step Solution

1. Step 1: Write the proportion equation
   4,171,951 : 8,663,648 = 8,663,648 : x
2. Step 2: Convert to fraction form
   4,171,951/8,663,648 = 8,663,648/x
3. Step 3: Cross multiply
   4,171,951x = 8,663,648 × 8,663,648
4. Step 4: Simplify right side
   4,171,951x = 75,058,796,667,904
5. Step 5: Solve for x
   x = 75,058,796,667,904/4,171,951
6. Step 6: Final answer
   x = 17,991,293.92