Finding the Third Proportional to 642,743 and 1,227,166

Step by Step Solution

1. Step 1: Write the proportion equation
   642,743 : 1,227,166 = 1,227,166 : x
2. Step 2: Convert to fraction form
   642,743/1,227,166 = 1,227,166/x
3. Step 3: Cross multiply
   642,743x = 1,227,166 × 1,227,166
4. Step 4: Simplify right side
   642,743x = 1,505,936,391,556
5. Step 5: Solve for x
   x = 1,505,936,391,556/642,743
6. Step 6: Final answer
   x = 2,342,983.73