Finding the Third Proportional to 40.86 and 110.72

Step by Step Solution

1. Step 1: Write the proportion equation
   40.86 : 110.72 = 110.72 : x
2. Step 2: Convert to fraction form
   40.86/110.72 = 110.72/x
3. Step 3: Cross multiply
   40.86x = 110.72 × 110.72
4. Step 4: Simplify right side
   40.86x = 12,259.69
5. Step 5: Solve for x
   x = 12,259.69/40.86
6. Step 6: Final answer
   x = 300.02