Finding the Third Proportional to 5,718,891 and 8,915,949

Step by Step Solution

1. Step 1: Write the proportion equation
   5,718,891 : 8,915,949 = 8,915,949 : x
2. Step 2: Convert to fraction form
   5,718,891/8,915,949 = 8,915,949/x
3. Step 3: Cross multiply
   5,718,891x = 8,915,949 × 8,915,949
4. Step 4: Simplify right side
   5,718,891x = 79,494,146,570,601
5. Step 5: Solve for x
   x = 79,494,146,570,601/5,718,891
6. Step 6: Final answer
   x = 13,900,273.07