Finding the Third Proportional to 231.38 and 351.38

Step by Step Solution

1. Step 1: Write the proportion equation
   231.38 : 351.38 = 351.38 : x
2. Step 2: Convert to fraction form
   231.38/351.38 = 351.38/x
3. Step 3: Cross multiply
   231.38x = 351.38 × 351.38
4. Step 4: Simplify right side
   231.38x = 123,464.39
5. Step 5: Solve for x
   x = 123,464.39/231.38
6. Step 6: Final answer
   x = 533.61