Finding the Third Proportional to 331.69 and 357.56

Step by Step Solution

1. Step 1: Write the proportion equation
   331.69 : 357.56 = 357.56 : x
2. Step 2: Convert to fraction form
   331.69/357.56 = 357.56/x
3. Step 3: Cross multiply
   331.69x = 357.56 × 357.56
4. Step 4: Simplify right side
   331.69x = 127,850.94
5. Step 5: Solve for x
   x = 127,850.94/331.69
6. Step 6: Final answer
   x = 385.46