Finding the Third Proportional to 845,638 and 1,309,647

Step by Step Solution

1. Step 1: Write the proportion equation
   845,638 : 1,309,647 = 1,309,647 : x
2. Step 2: Convert to fraction form
   845,638/1,309,647 = 1,309,647/x
3. Step 3: Cross multiply
   845,638x = 1,309,647 × 1,309,647
4. Step 4: Simplify right side
   845,638x = 1,715,175,264,609
5. Step 5: Solve for x
   x = 1,715,175,264,609/845,638
6. Step 6: Final answer
   x = 2,028,261.81