Finding the Third Proportional to 65,980 and 143,800

Step by Step Solution

1. Step 1: Write the proportion equation
   65,980 : 143,800 = 143,800 : x
2. Step 2: Convert to fraction form
   65,980/143,800 = 143,800/x
3. Step 3: Cross multiply
   65,980x = 143,800 × 143,800
4. Step 4: Simplify right side
   65,980x = 20,678,440,000
5. Step 5: Solve for x
   x = 20,678,440,000/65,980
6. Step 6: Final answer
   x = 313,404.67