Finding the Third Proportional to 811,626 and 1,261,647

Step by Step Solution

1. Step 1: Write the proportion equation
   811,626 : 1,261,647 = 1,261,647 : x
2. Step 2: Convert to fraction form
   811,626/1,261,647 = 1,261,647/x
3. Step 3: Cross multiply
   811,626x = 1,261,647 × 1,261,647
4. Step 4: Simplify right side
   811,626x = 1,591,753,152,609
5. Step 5: Solve for x
   x = 1,591,753,152,609/811,626
6. Step 6: Final answer
   x = 1,961,190.44