Finding the Third Proportional to 639,847 and 1,400,222

Step by Step Solution

1. Step 1: Write the proportion equation
   639,847 : 1,400,222 = 1,400,222 : x
2. Step 2: Convert to fraction form
   639,847/1,400,222 = 1,400,222/x
3. Step 3: Cross multiply
   639,847x = 1,400,222 × 1,400,222
4. Step 4: Simplify right side
   639,847x = 1,960,621,649,284
5. Step 5: Solve for x
   x = 1,960,621,649,284/639,847
6. Step 6: Final answer
   x = 3,064,203.86