Finding the Third Proportional to 4,212,209 and 8,214,466

Step by Step Solution

1. Step 1: Write the proportion equation
   4,212,209 : 8,214,466 = 8,214,466 : x
2. Step 2: Convert to fraction form
   4,212,209/8,214,466 = 8,214,466/x
3. Step 3: Cross multiply
   4,212,209x = 8,214,466 × 8,214,466
4. Step 4: Simplify right side
   4,212,209x = 67,477,451,665,156
5. Step 5: Solve for x
   x = 67,477,451,665,156/4,212,209
6. Step 6: Final answer
   x = 16,019,492.78