Finding the Fourth Proportional to 127.55, 191.41 and 55.42

Step by Step Solution

1. Step 1: Write the proportion equation
   127.55 : 191.41 = 55.42 : x
2. Step 2: Convert to fraction form
   127.55/191.41 = 55.42/x
3. Step 3: Cross multiply
   127.55x = 191.41 × 55.42
4. Step 4: Simplify right side
   127.55x = 10,607.33
5. Step 5: Solve for x
   x = 10,607.33/127.55
6. Step 6: Final answer
   x = 83.16