Finding the Third Proportional to 642,349 and 1,383,356

Step by Step Solution

1. Step 1: Write the proportion equation
   642,349 : 1,383,356 = 1,383,356 : x
2. Step 2: Convert to fraction form
   642,349/1,383,356 = 1,383,356/x
3. Step 3: Cross multiply
   642,349x = 1,383,356 × 1,383,356
4. Step 4: Simplify right side
   642,349x = 1,913,673,822,736
5. Step 5: Solve for x
   x = 1,913,673,822,736/642,349
6. Step 6: Final answer
   x = 2,979,180.82