Finding the Third Proportional to 155.25 and 336.38

Step by Step Solution

1. Step 1: Write the proportion equation
   155.25 : 336.38 = 336.38 : x
2. Step 2: Convert to fraction form
   155.25/336.38 = 336.38/x
3. Step 3: Cross multiply
   155.25x = 336.38 × 336.38
4. Step 4: Simplify right side
   155.25x = 113,148.14
5. Step 5: Solve for x
   x = 113,148.14/155.25
6. Step 6: Final answer
   x = 728.81