Finding the Third Proportional to 646,792 and 1,406,836

Step by Step Solution

1. Step 1: Write the proportion equation
   646,792 : 1,406,836 = 1,406,836 : x
2. Step 2: Convert to fraction form
   646,792/1,406,836 = 1,406,836/x
3. Step 3: Cross multiply
   646,792x = 1,406,836 × 1,406,836
4. Step 4: Simplify right side
   646,792x = 1,979,187,530,896
5. Step 5: Solve for x
   x = 1,979,187,530,896/646,792
6. Step 6: Final answer
   x = 3,060,006.20