Finding the Third Proportional to 639,523 and 1,367,661

Step by Step Solution

1. Step 1: Write the proportion equation
   639,523 : 1,367,661 = 1,367,661 : x
2. Step 2: Convert to fraction form
   639,523/1,367,661 = 1,367,661/x
3. Step 3: Cross multiply
   639,523x = 1,367,661 × 1,367,661
4. Step 4: Simplify right side
   639,523x = 1,870,496,610,921
5. Step 5: Solve for x
   x = 1,870,496,610,921/639,523
6. Step 6: Final answer
   x = 2,924,830.87