Finding the Third Proportional to 65,721 and 143,604

Step by Step Solution

1. Step 1: Write the proportion equation
   65,721 : 143,604 = 143,604 : x
2. Step 2: Convert to fraction form
   65,721/143,604 = 143,604/x
3. Step 3: Cross multiply
   65,721x = 143,604 × 143,604
4. Step 4: Simplify right side
   65,721x = 20,622,108,816
5. Step 5: Solve for x
   x = 20,622,108,816/65,721
6. Step 6: Final answer
   x = 313,782.64