Finding the Third Proportional to 41.81 and 85.78

Step by Step Solution

1. Step 1: Write the proportion equation
   41.81 : 85.78 = 85.78 : x
2. Step 2: Convert to fraction form
   41.81/85.78 = 85.78/x
3. Step 3: Cross multiply
   41.81x = 85.78 × 85.78
4. Step 4: Simplify right side
   41.81x = 7,358.42
5. Step 5: Solve for x
   x = 7,358.42/41.81
6. Step 6: Final answer
   x = 175.99