Finding the Third Proportional to 4,128,515 and 8,633,467

Step by Step Solution

1. Step 1: Write the proportion equation
   4,128,515 : 8,633,467 = 8,633,467 : x
2. Step 2: Convert to fraction form
   4,128,515/8,633,467 = 8,633,467/x
3. Step 3: Cross multiply
   4,128,515x = 8,633,467 × 8,633,467
4. Step 4: Simplify right side
   4,128,515x = 74,536,752,440,089
5. Step 5: Solve for x
   x = 74,536,752,440,089/4,128,515
6. Step 6: Final answer
   x = 18,054,131.43