Finding the Third Proportional to 5,673,647 and 8,511,699

Step by Step Solution

1. Step 1: Write the proportion equation
   5,673,647 : 8,511,699 = 8,511,699 : x
2. Step 2: Convert to fraction form
   5,673,647/8,511,699 = 8,511,699/x
3. Step 3: Cross multiply
   5,673,647x = 8,511,699 × 8,511,699
4. Step 4: Simplify right side
   5,673,647x = 72,449,019,866,601
5. Step 5: Solve for x
   x = 72,449,019,866,601/5,673,647
6. Step 6: Final answer
   x = 12,769,391.52