Finding the Fourth Proportional to 141.72, 195.56 and 82.72

Step by Step Solution

1. Step 1: Write the proportion equation
   141.72 : 195.56 = 82.72 : x
2. Step 2: Convert to fraction form
   141.72/195.56 = 82.72/x
3. Step 3: Cross multiply
   141.72x = 195.56 × 82.72
4. Step 4: Simplify right side
   141.72x = 16,176.72
5. Step 5: Solve for x
   x = 16,176.72/141.72
6. Step 6: Final answer
   x = 114.15