Finding the Fourth Proportional to 127.48, 191.10 and 72.72

Step by Step Solution

1. Step 1: Write the proportion equation
   127.48 : 191.10 = 72.72 : x
2. Step 2: Convert to fraction form
   127.48/191.10 = 72.72/x
3. Step 3: Cross multiply
   127.48x = 191.10 × 72.72
4. Step 4: Simplify right side
   127.48x = 13,896.79
5. Step 5: Solve for x
   x = 13,896.79/127.48
6. Step 6: Final answer
   x = 109.02