Finding the Third Proportional to 8,443,647 and 18,435,690

Step by Step Solution

1. Step 1: Write the proportion equation
   8,443,647 : 18,435,690 = 18,435,690 : x
2. Step 2: Convert to fraction form
   8,443,647/18,435,690 = 18,435,690/x
3. Step 3: Cross multiply
   8,443,647x = 18,435,690 × 18,435,690
4. Step 4: Simplify right side
   8,443,647x = 339,874,665,776,100
5. Step 5: Solve for x
   x = 339,874,665,776,100/8,443,647
6. Step 6: Final answer
   x = 40,252,116.86