Finding the Fourth Proportional to 131.38, 196.99 and 54.27

Step by Step Solution

1. Step 1: Write the proportion equation
   131.38 : 196.99 = 54.27 : x
2. Step 2: Convert to fraction form
   131.38/196.99 = 54.27/x
3. Step 3: Cross multiply
   131.38x = 196.99 × 54.27
4. Step 4: Simplify right side
   131.38x = 10,690.51
5. Step 5: Solve for x
   x = 10,690.51/131.38
6. Step 6: Final answer
   x = 81.37