Finding the Third Proportional to 123.75 and 266.75

Step by Step Solution

1. Step 1: Write the proportion equation
   123.75 : 266.75 = 266.75 : x
2. Step 2: Convert to fraction form
   123.75/266.75 = 266.75/x
3. Step 3: Cross multiply
   123.75x = 266.75 × 266.75
4. Step 4: Simplify right side
   123.75x = 71,155.56
5. Step 5: Solve for x
   x = 71,155.56/123.75
6. Step 6: Final answer
   x = 574.99