Finding the Third Proportional to 642,274 and 1,383,206

Step by Step Solution

1. Step 1: Write the proportion equation
   642,274 : 1,383,206 = 1,383,206 : x
2. Step 2: Convert to fraction form
   642,274/1,383,206 = 1,383,206/x
3. Step 3: Cross multiply
   642,274x = 1,383,206 × 1,383,206
4. Step 4: Simplify right side
   642,274x = 1,913,258,838,436
5. Step 5: Solve for x
   x = 1,913,258,838,436/642,274
6. Step 6: Final answer
   x = 2,978,882.59