Finding the Fourth Proportional to 443.05, 664.61 and 118.42

Step by Step Solution

1. Step 1: Write the proportion equation
   443.05 : 664.61 = 118.42 : x
2. Step 2: Convert to fraction form
   443.05/664.61 = 118.42/x
3. Step 3: Cross multiply
   443.05x = 664.61 × 118.42
4. Step 4: Simplify right side
   443.05x = 78,700.86
5. Step 5: Solve for x
   x = 78,700.86/443.05
6. Step 6: Final answer
   x = 177.64