Finding the Third Proportional to 230.72 and 300.09

Step by Step Solution

1. Step 1: Write the proportion equation
   230.72 : 300.09 = 300.09 : x
2. Step 2: Convert to fraction form
   230.72/300.09 = 300.09/x
3. Step 3: Cross multiply
   230.72x = 300.09 × 300.09
4. Step 4: Simplify right side
   230.72x = 90,056.26
5. Step 5: Solve for x
   x = 90,056.26/230.72
6. Step 6: Final answer
   x = 390.33