Finding the Fourth Proportional to 131.25, 196.86 and 50.12

Step by Step Solution

1. Step 1: Write the proportion equation
   131.25 : 196.86 = 50.12 : x
2. Step 2: Convert to fraction form
   131.25/196.86 = 50.12/x
3. Step 3: Cross multiply
   131.25x = 196.86 × 50.12
4. Step 4: Simplify right side
   131.25x = 9,866.57
5. Step 5: Solve for x
   x = 9,866.57/131.25
6. Step 6: Final answer
   x = 75.17