Finding the Fourth Proportional to 127.50, 191.15 and 55.32

Step by Step Solution

1. Step 1: Write the proportion equation
   127.50 : 191.15 = 55.32 : x
2. Step 2: Convert to fraction form
   127.50/191.15 = 55.32/x
3. Step 3: Cross multiply
   127.50x = 191.15 × 55.32
4. Step 4: Simplify right side
   127.50x = 10,574.42
5. Step 5: Solve for x
   x = 10,574.42/127.50
6. Step 6: Final answer
   x = 82.94