Finding the Third Proportional to 255.94 and 376.31

Step by Step Solution

1. Step 1: Write the proportion equation
   255.94 : 376.31 = 376.31 : x
2. Step 2: Convert to fraction form
   255.94/376.31 = 376.31/x
3. Step 3: Cross multiply
   255.94x = 376.31 × 376.31
4. Step 4: Simplify right side
   255.94x = 141,611.10
5. Step 5: Solve for x
   x = 141,611.10/255.94
6. Step 6: Final answer
   x = 553.30