Finding the Third Proportional to 123.19 and 255.94

Step by Step Solution

1. Step 1: Write the proportion equation
   123.19 : 255.94 = 255.94 : x
2. Step 2: Convert to fraction form
   123.19/255.94 = 255.94/x
3. Step 3: Cross multiply
   123.19x = 255.94 × 255.94
4. Step 4: Simplify right side
   123.19x = 65,504.00
5. Step 5: Solve for x
   x = 65,504.00/123.19
6. Step 6: Final answer
   x = 531.74