Finding the Fourth Proportional to 131.31, 196.99 and 50.15

Step by Step Solution

1. Step 1: Write the proportion equation
   131.31 : 196.99 = 50.15 : x
2. Step 2: Convert to fraction form
   131.31/196.99 = 50.15/x
3. Step 3: Cross multiply
   131.31x = 196.99 × 50.15
4. Step 4: Simplify right side
   131.31x = 9,879.05
5. Step 5: Solve for x
   x = 9,879.05/131.31
6. Step 6: Final answer
   x = 75.23