Finding the Third Proportional to 642,384 and 1,383,432

Step by Step Solution

1. Step 1: Write the proportion equation
   642,384 : 1,383,432 = 1,383,432 : x
2. Step 2: Convert to fraction form
   642,384/1,383,432 = 1,383,432/x
3. Step 3: Cross multiply
   642,384x = 1,383,432 × 1,383,432
4. Step 4: Simplify right side
   642,384x = 1,913,884,098,624
5. Step 5: Solve for x
   x = 1,913,884,098,624/642,384
6. Step 6: Final answer
   x = 2,979,345.84