Finding the Third Proportional to 111.89 and 245.85

Step by Step Solution

1. Step 1: Write the proportion equation
   111.89 : 245.85 = 245.85 : x
2. Step 2: Convert to fraction form
   111.89/245.85 = 245.85/x
3. Step 3: Cross multiply
   111.89x = 245.85 × 245.85
4. Step 4: Simplify right side
   111.89x = 60,441.07
5. Step 5: Solve for x
   x = 60,441.07/111.89
6. Step 6: Final answer
   x = 540.19