Finding the Third Proportional to 1,691,620 and 3,647,311

Step by Step Solution

1. Step 1: Write the proportion equation
   1,691,620 : 3,647,311 = 3,647,311 : x
2. Step 2: Convert to fraction form
   1,691,620/3,647,311 = 3,647,311/x
3. Step 3: Cross multiply
   1,691,620x = 3,647,311 × 3,647,311
4. Step 4: Simplify right side
   1,691,620x = 13,302,877,530,721
5. Step 5: Solve for x
   x = 13,302,877,530,721/1,691,620
6. Step 6: Final answer
   x = 7,863,986.91