Finding the Third Proportional to 639,538 and 1,375,850

Step by Step Solution

1. Step 1: Write the proportion equation
   639,538 : 1,375,850 = 1,375,850 : x
2. Step 2: Convert to fraction form
   639,538/1,375,850 = 1,375,850/x
3. Step 3: Cross multiply
   639,538x = 1,375,850 × 1,375,850
4. Step 4: Simplify right side
   639,538x = 1,892,963,222,500
5. Step 5: Solve for x
   x = 1,892,963,222,500/639,538
6. Step 6: Final answer
   x = 2,959,891.71