Finding the Fourth Proportional to 131.17, 196.69 and 54.14

Step by Step Solution

1. Step 1: Write the proportion equation
   131.17 : 196.69 = 54.14 : x
2. Step 2: Convert to fraction form
   131.17/196.69 = 54.14/x
3. Step 3: Cross multiply
   131.17x = 196.69 × 54.14
4. Step 4: Simplify right side
   131.17x = 10,648.80
5. Step 5: Solve for x
   x = 10,648.80/131.17
6. Step 6: Final answer
   x = 81.18