Finding the Third Proportional to 300.09 and 403.31

Step by Step Solution

1. Step 1: Write the proportion equation
   300.09 : 403.31 = 403.31 : x
2. Step 2: Convert to fraction form
   300.09/403.31 = 403.31/x
3. Step 3: Cross multiply
   300.09x = 403.31 × 403.31
4. Step 4: Simplify right side
   300.09x = 162,660.97
5. Step 5: Solve for x
   x = 162,660.97/300.09
6. Step 6: Final answer
   x = 542.03