Finding the Fourth Proportional to 127.27, 190.83 and 55.09

Step by Step Solution

1. Step 1: Write the proportion equation
   127.27 : 190.83 = 55.09 : x
2. Step 2: Convert to fraction form
   127.27/190.83 = 55.09/x
3. Step 3: Cross multiply
   127.27x = 190.83 × 55.09
4. Step 4: Simplify right side
   127.27x = 10,512.82
5. Step 5: Solve for x
   x = 10,512.82/127.27
6. Step 6: Final answer
   x = 82.60