Finding the Third Proportional to 111.25 and 242.56

Step by Step Solution

1. Step 1: Write the proportion equation
   111.25 : 242.56 = 242.56 : x
2. Step 2: Convert to fraction form
   111.25/242.56 = 242.56/x
3. Step 3: Cross multiply
   111.25x = 242.56 × 242.56
4. Step 4: Simplify right side
   111.25x = 58,836.57
5. Step 5: Solve for x
   x = 58,836.57/111.25
6. Step 6: Final answer
   x = 528.87