Finding the Third Proportional to 642,339 and 1,383,336

Step by Step Solution

1. Step 1: Write the proportion equation
   642,339 : 1,383,336 = 1,383,336 : x
2. Step 2: Convert to fraction form
   642,339/1,383,336 = 1,383,336/x
3. Step 3: Cross multiply
   642,339x = 1,383,336 × 1,383,336
4. Step 4: Simplify right side
   642,339x = 1,913,618,488,896
5. Step 5: Solve for x
   x = 1,913,618,488,896/642,339
6. Step 6: Final answer
   x = 2,979,141.06