Finding the Third Proportional to 3,117,638 and 7,284,211

Step by Step Solution

1. Step 1: Write the proportion equation
   3,117,638 : 7,284,211 = 7,284,211 : x
2. Step 2: Convert to fraction form
   3,117,638/7,284,211 = 7,284,211/x
3. Step 3: Cross multiply
   3,117,638x = 7,284,211 × 7,284,211
4. Step 4: Simplify right side
   3,117,638x = 53,059,729,892,521
5. Step 5: Solve for x
   x = 53,059,729,892,521/3,117,638
6. Step 6: Final answer
   x = 17,019,208.10