Finding the Third Proportional to 639,849 and 1,400,226

Step by Step Solution

1. Step 1: Write the proportion equation
   639,849 : 1,400,226 = 1,400,226 : x
2. Step 2: Convert to fraction form
   639,849/1,400,226 = 1,400,226/x
3. Step 3: Cross multiply
   639,849x = 1,400,226 × 1,400,226
4. Step 4: Simplify right side
   639,849x = 1,960,632,851,076
5. Step 5: Solve for x
   x = 1,960,632,851,076/639,849
6. Step 6: Final answer
   x = 3,064,211.79