Finding the Third Proportional to 639,792 and 1,400,112

Step by Step Solution

1. Step 1: Write the proportion equation
   639,792 : 1,400,112 = 1,400,112 : x
2. Step 2: Convert to fraction form
   639,792/1,400,112 = 1,400,112/x
3. Step 3: Cross multiply
   639,792x = 1,400,112 × 1,400,112
4. Step 4: Simplify right side
   639,792x = 1,960,313,612,544
5. Step 5: Solve for x
   x = 1,960,313,612,544/639,792
6. Step 6: Final answer
   x = 3,063,985.81