Finding the Third Proportional to 7,647,426 and 11,738,499

Step by Step Solution

1. Step 1: Write the proportion equation
   7,647,426 : 11,738,499 = 11,738,499 : x
2. Step 2: Convert to fraction form
   7,647,426/11,738,499 = 11,738,499/x
3. Step 3: Cross multiply
   7,647,426x = 11,738,499 × 11,738,499
4. Step 4: Simplify right side
   7,647,426x = 137,792,358,773,001
5. Step 5: Solve for x
   x = 137,792,358,773,001/7,647,426
6. Step 6: Final answer
   x = 18,018,135.61