Finding the Third Proportional to 133,980 and 213,270.50

Step by Step Solution

1. Step 1: Write the proportion equation
   133,980 : 213,270.50 = 213,270.50 : x
2. Step 2: Convert to fraction form
   133,980/213,270.50 = 213,270.50/x
3. Step 3: Cross multiply
   133,980x = 213,270.50 × 213,270.50
4. Step 4: Simplify right side
   133,980x = 45,484,306,170.25
5. Step 5: Solve for x
   x = 45,484,306,170.25/133,980
6. Step 6: Final answer
   x = 339,485.79