Finding the Third Proportional to 642,418 and 1,383,500

Step by Step Solution

1. Step 1: Write the proportion equation
   642,418 : 1,383,500 = 1,383,500 : x
2. Step 2: Convert to fraction form
   642,418/1,383,500 = 1,383,500/x
3. Step 3: Cross multiply
   642,418x = 1,383,500 × 1,383,500
4. Step 4: Simplify right side
   642,418x = 1,914,072,250,000
5. Step 5: Solve for x
   x = 1,914,072,250,000/642,418
6. Step 6: Final answer
   x = 2,979,481.04