Finding the Third Proportional to 142,720 and 337,521

Step by Step Solution

1. Step 1: Write the proportion equation
   142,720 : 337,521 = 337,521 : x
2. Step 2: Convert to fraction form
   142,720/337,521 = 337,521/x
3. Step 3: Cross multiply
   142,720x = 337,521 × 337,521
4. Step 4: Simplify right side
   142,720x = 113,920,425,441
5. Step 5: Solve for x
   x = 113,920,425,441/142,720
6. Step 6: Final answer
   x = 798,209.26