Finding the Third Proportional to 639,596 and 1,366,600

Step by Step Solution

1. Step 1: Write the proportion equation
   639,596 : 1,366,600 = 1,366,600 : x
2. Step 2: Convert to fraction form
   639,596/1,366,600 = 1,366,600/x
3. Step 3: Cross multiply
   639,596x = 1,366,600 × 1,366,600
4. Step 4: Simplify right side
   639,596x = 1,867,595,560,000
5. Step 5: Solve for x
   x = 1,867,595,560,000/639,596
6. Step 6: Final answer
   x = 2,919,961.29