Finding the Third Proportional to 641,720 and 1,366,016

Step by Step Solution

1. Step 1: Write the proportion equation
   641,720 : 1,366,016 = 1,366,016 : x
2. Step 2: Convert to fraction form
   641,720/1,366,016 = 1,366,016/x
3. Step 3: Cross multiply
   641,720x = 1,366,016 × 1,366,016
4. Step 4: Simplify right side
   641,720x = 1,865,999,712,256
5. Step 5: Solve for x
   x = 1,865,999,712,256/641,720
6. Step 6: Final answer
   x = 2,907,809.81