Finding the Third Proportional to 67.78 and 165.94

Step by Step Solution

1. Step 1: Write the proportion equation
   67.78 : 165.94 = 165.94 : x
2. Step 2: Convert to fraction form
   67.78/165.94 = 165.94/x
3. Step 3: Cross multiply
   67.78x = 165.94 × 165.94
4. Step 4: Simplify right side
   67.78x = 27,535.25
5. Step 5: Solve for x
   x = 27,535.25/67.78
6. Step 6: Final answer
   x = 406.24