Finding the Third Proportional to 111.69 and 236.88

Step by Step Solution

1. Step 1: Write the proportion equation
   111.69 : 236.88 = 236.88 : x
2. Step 2: Convert to fraction form
   111.69/236.88 = 236.88/x
3. Step 3: Cross multiply
   111.69x = 236.88 × 236.88
4. Step 4: Simplify right side
   111.69x = 56,109.77
5. Step 5: Solve for x
   x = 56,109.77/111.69
6. Step 6: Final answer
   x = 502.38