Finding the Fourth Proportional to 127.56, 191.30 and 55.34

Step by Step Solution

1. Step 1: Write the proportion equation
   127.56 : 191.30 = 55.34 : x
2. Step 2: Convert to fraction form
   127.56/191.30 = 55.34/x
3. Step 3: Cross multiply
   127.56x = 191.30 × 55.34
4. Step 4: Simplify right side
   127.56x = 10,586.54
5. Step 5: Solve for x
   x = 10,586.54/127.56
6. Step 6: Final answer
   x = 82.99