Finding the Third Proportional to 622,920 and 978,650

Step by Step Solution

1. Step 1: Write the proportion equation
   622,920 : 978,650 = 978,650 : x
2. Step 2: Convert to fraction form
   622,920/978,650 = 978,650/x
3. Step 3: Cross multiply
   622,920x = 978,650 × 978,650
4. Step 4: Simplify right side
   622,920x = 957,755,822,500
5. Step 5: Solve for x
   x = 957,755,822,500/622,920
6. Step 6: Final answer
   x = 1,537,526.20