Finding the Fourth Proportional to 127.50, 191.14 and 55.42

Step by Step Solution

1. Step 1: Write the proportion equation
   127.50 : 191.14 = 55.42 : x
2. Step 2: Convert to fraction form
   127.50/191.14 = 55.42/x
3. Step 3: Cross multiply
   127.50x = 191.14 × 55.42
4. Step 4: Simplify right side
   127.50x = 10,592.98
5. Step 5: Solve for x
   x = 10,592.98/127.50
6. Step 6: Final answer
   x = 83.08