Finding the Third Proportional to 8,617,478 and 13,105,266

Step by Step Solution

1. Step 1: Write the proportion equation
   8,617,478 : 13,105,266 = 13,105,266 : x
2. Step 2: Convert to fraction form
   8,617,478/13,105,266 = 13,105,266/x
3. Step 3: Cross multiply
   8,617,478x = 13,105,266 × 13,105,266
4. Step 4: Simplify right side
   8,617,478x = 171,747,996,930,756
5. Step 5: Solve for x
   x = 171,747,996,930,756/8,617,478
6. Step 6: Final answer
   x = 19,930,192.68