Finding the Fourth Proportional to 127.88, 191.87 and 55.69

Step by Step Solution

1. Step 1: Write the proportion equation
   127.88 : 191.87 = 55.69 : x
2. Step 2: Convert to fraction form
   127.88/191.87 = 55.69/x
3. Step 3: Cross multiply
   127.88x = 191.87 × 55.69
4. Step 4: Simplify right side
   127.88x = 10,684.69
5. Step 5: Solve for x
   x = 10,684.69/127.88
6. Step 6: Final answer
   x = 83.55