Finding the Third Proportional to 3,939,644 and 8,467,736

Step by Step Solution

1. Step 1: Write the proportion equation
   3,939,644 : 8,467,736 = 8,467,736 : x
2. Step 2: Convert to fraction form
   3,939,644/8,467,736 = 8,467,736/x
3. Step 3: Cross multiply
   3,939,644x = 8,467,736 × 8,467,736
4. Step 4: Simplify right side
   3,939,644x = 71,702,552,965,696
5. Step 5: Solve for x
   x = 71,702,552,965,696/3,939,644
6. Step 6: Final answer
   x = 18,200,261.99