Finding the Fourth Proportional to 127.55, 175.98 and 72.27

Step by Step Solution

1. Step 1: Write the proportion equation
   127.55 : 175.98 = 72.27 : x
2. Step 2: Convert to fraction form
   127.55/175.98 = 72.27/x
3. Step 3: Cross multiply
   127.55x = 175.98 × 72.27
4. Step 4: Simplify right side
   127.55x = 12,718.07
5. Step 5: Solve for x
   x = 12,718.07/127.55
6. Step 6: Final answer
   x = 99.71