Finding the Third Proportional to 639,562 and 1,375,897

Step by Step Solution

1. Step 1: Write the proportion equation
   639,562 : 1,375,897 = 1,375,897 : x
2. Step 2: Convert to fraction form
   639,562/1,375,897 = 1,375,897/x
3. Step 3: Cross multiply
   639,562x = 1,375,897 × 1,375,897
4. Step 4: Simplify right side
   639,562x = 1,893,092,554,609
5. Step 5: Solve for x
   x = 1,893,092,554,609/639,562
6. Step 6: Final answer
   x = 2,959,982.85