Finding the Third Proportional to 611,706 and 1,266,420

Step by Step Solution

1. Step 1: Write the proportion equation
   611,706 : 1,266,420 = 1,266,420 : x
2. Step 2: Convert to fraction form
   611,706/1,266,420 = 1,266,420/x
3. Step 3: Cross multiply
   611,706x = 1,266,420 × 1,266,420
4. Step 4: Simplify right side
   611,706x = 1,603,819,616,400
5. Step 5: Solve for x
   x = 1,603,819,616,400/611,706
6. Step 6: Final answer
   x = 2,621,879.82