Finding the Third Proportional to 1,691,578 and 3,647,238

Step by Step Solution

1. Step 1: Write the proportion equation
   1,691,578 : 3,647,238 = 3,647,238 : x
2. Step 2: Convert to fraction form
   1,691,578/3,647,238 = 3,647,238/x
3. Step 3: Cross multiply
   1,691,578x = 3,647,238 × 3,647,238
4. Step 4: Simplify right side
   1,691,578x = 13,302,345,028,644
5. Step 5: Solve for x
   x = 13,302,345,028,644/1,691,578
6. Step 6: Final answer
   x = 7,863,867.36