Finding the Third Proportional to 639,828 and 1,400,184

Step by Step Solution

1. Step 1: Write the proportion equation
   639,828 : 1,400,184 = 1,400,184 : x
2. Step 2: Convert to fraction form
   639,828/1,400,184 = 1,400,184/x
3. Step 3: Cross multiply
   639,828x = 1,400,184 × 1,400,184
4. Step 4: Simplify right side
   639,828x = 1,960,515,233,856
5. Step 5: Solve for x
   x = 1,960,515,233,856/639,828
6. Step 6: Final answer
   x = 3,064,128.54