Finding the Third Proportional to 5,234,992 and 7,821,216

Step by Step Solution

1. Step 1: Write the proportion equation
   5,234,992 : 7,821,216 = 7,821,216 : x
2. Step 2: Convert to fraction form
   5,234,992/7,821,216 = 7,821,216/x
3. Step 3: Cross multiply
   5,234,992x = 7,821,216 × 7,821,216
4. Step 4: Simplify right side
   5,234,992x = 61,171,419,718,656
5. Step 5: Solve for x
   x = 61,171,419,718,656/5,234,992
6. Step 6: Final answer
   x = 11,685,102.81