Finding the Third Proportional to 143,980 and 214,469

Step by Step Solution

1. Step 1: Write the proportion equation
   143,980 : 214,469 = 214,469 : x
2. Step 2: Convert to fraction form
   143,980/214,469 = 214,469/x
3. Step 3: Cross multiply
   143,980x = 214,469 × 214,469
4. Step 4: Simplify right side
   143,980x = 45,996,951,961
5. Step 5: Solve for x
   x = 45,996,951,961/143,980
6. Step 6: Final answer
   x = 319,467.65