Finding the Third Proportional to 646,622 and 1,405,166

Step by Step Solution

1. Step 1: Write the proportion equation
   646,622 : 1,405,166 = 1,405,166 : x
2. Step 2: Convert to fraction form
   646,622/1,405,166 = 1,405,166/x
3. Step 3: Cross multiply
   646,622x = 1,405,166 × 1,405,166
4. Step 4: Simplify right side
   646,622x = 1,974,491,487,556
5. Step 5: Solve for x
   x = 1,974,491,487,556/646,622
6. Step 6: Final answer
   x = 3,053,548.27