Finding the Fourth Proportional to 127.50, 191.32 and 50.50

Step by Step Solution

1. Step 1: Write the proportion equation
   127.50 : 191.32 = 50.50 : x
2. Step 2: Convert to fraction form
   127.50/191.32 = 50.50/x
3. Step 3: Cross multiply
   127.50x = 191.32 × 50.50
4. Step 4: Simplify right side
   127.50x = 9,661.59
5. Step 5: Solve for x
   x = 9,661.59/127.50
6. Step 6: Final answer
   x = 75.78