Finding the Fourth Proportional to 131.37, 196.90 and 54.25

Step by Step Solution

1. Step 1: Write the proportion equation
   131.37 : 196.90 = 54.25 : x
2. Step 2: Convert to fraction form
   131.37/196.90 = 54.25/x
3. Step 3: Cross multiply
   131.37x = 196.90 × 54.25
4. Step 4: Simplify right side
   131.37x = 10,681.83
5. Step 5: Solve for x
   x = 10,681.83/131.37
6. Step 6: Final answer
   x = 81.31