Finding the Third Proportional to 109.69 and 236.81

Step by Step Solution

1. Step 1: Write the proportion equation
   109.69 : 236.81 = 236.81 : x
2. Step 2: Convert to fraction form
   109.69/236.81 = 236.81/x
3. Step 3: Cross multiply
   109.69x = 236.81 × 236.81
4. Step 4: Simplify right side
   109.69x = 56,080.16
5. Step 5: Solve for x
   x = 56,080.16/109.69
6. Step 6: Final answer
   x = 511.27