Finding the Fourth Proportional to 127.50, 191.29 and 55.37

Step by Step Solution

1. Step 1: Write the proportion equation
   127.50 : 191.29 = 55.37 : x
2. Step 2: Convert to fraction form
   127.50/191.29 = 55.37/x
3. Step 3: Cross multiply
   127.50x = 191.29 × 55.37
4. Step 4: Simplify right side
   127.50x = 10,591.73
5. Step 5: Solve for x
   x = 10,591.73/127.50
6. Step 6: Final answer
   x = 83.07