Finding the Third Proportional to 67.69 and 143.81

Step by Step Solution

1. Step 1: Write the proportion equation
   67.69 : 143.81 = 143.81 : x
2. Step 2: Convert to fraction form
   67.69/143.81 = 143.81/x
3. Step 3: Cross multiply
   67.69x = 143.81 × 143.81
4. Step 4: Simplify right side
   67.69x = 20,682.04
5. Step 5: Solve for x
   x = 20,682.04/67.69
6. Step 6: Final answer
   x = 305.55