Finding the Fourth Proportional to 127.47, 191.27 and 55.31

Step by Step Solution

1. Step 1: Write the proportion equation
   127.47 : 191.27 = 55.31 : x
2. Step 2: Convert to fraction form
   127.47/191.27 = 55.31/x
3. Step 3: Cross multiply
   127.47x = 191.27 × 55.31
4. Step 4: Simplify right side
   127.47x = 10,579.76
5. Step 5: Solve for x
   x = 10,579.76/127.47
6. Step 6: Final answer
   x = 83.00