Finding the Third Proportional to 8,216,166 and 12,789,234

Step by Step Solution

1. Step 1: Write the proportion equation
   8,216,166 : 12,789,234 = 12,789,234 : x
2. Step 2: Convert to fraction form
   8,216,166/12,789,234 = 12,789,234/x
3. Step 3: Cross multiply
   8,216,166x = 12,789,234 × 12,789,234
4. Step 4: Simplify right side
   8,216,166x = 163,564,506,306,756
5. Step 5: Solve for x
   x = 163,564,506,306,756/8,216,166
6. Step 6: Final answer
   x = 19,907,643.82