Finding the Third Proportional to 809,640 and 1,207,892

Step by Step Solution

1. Step 1: Write the proportion equation
   809,640 : 1,207,892 = 1,207,892 : x
2. Step 2: Convert to fraction form
   809,640/1,207,892 = 1,207,892/x
3. Step 3: Cross multiply
   809,640x = 1,207,892 × 1,207,892
4. Step 4: Simplify right side
   809,640x = 1,459,003,083,664
5. Step 5: Solve for x
   x = 1,459,003,083,664/809,640
6. Step 6: Final answer
   x = 1,802,039.28