Finding the Third Proportional to 639,902 and 1,400,332

Step by Step Solution

1. Step 1: Write the proportion equation
   639,902 : 1,400,332 = 1,400,332 : x
2. Step 2: Convert to fraction form
   639,902/1,400,332 = 1,400,332/x
3. Step 3: Cross multiply
   639,902x = 1,400,332 × 1,400,332
4. Step 4: Simplify right side
   639,902x = 1,960,929,710,224
5. Step 5: Solve for x
   x = 1,960,929,710,224/639,902
6. Step 6: Final answer
   x = 3,064,421.91