Finding the Third Proportional to 639,970 and 1,371,020

Step by Step Solution

1. Step 1: Write the proportion equation
   639,970 : 1,371,020 = 1,371,020 : x
2. Step 2: Convert to fraction form
   639,970/1,371,020 = 1,371,020/x
3. Step 3: Cross multiply
   639,970x = 1,371,020 × 1,371,020
4. Step 4: Simplify right side
   639,970x = 1,879,695,840,400
5. Step 5: Solve for x
   x = 1,879,695,840,400/639,970
6. Step 6: Final answer
   x = 2,937,162.43