Finding the Fourth Proportional to 131.82, 197.72 and 54.76

Step by Step Solution

1. Step 1: Write the proportion equation
   131.82 : 197.72 = 54.76 : x
2. Step 2: Convert to fraction form
   131.82/197.72 = 54.76/x
3. Step 3: Cross multiply
   131.82x = 197.72 × 54.76
4. Step 4: Simplify right side
   131.82x = 10,827.15
5. Step 5: Solve for x
   x = 10,827.15/131.82
6. Step 6: Final answer
   x = 82.14