Finding the Fourth Proportional to 127.48, 190.62 and 109.72

Step by Step Solution

1. Step 1: Write the proportion equation
   127.48 : 190.62 = 109.72 : x
2. Step 2: Convert to fraction form
   127.48/190.62 = 109.72/x
3. Step 3: Cross multiply
   127.48x = 190.62 × 109.72
4. Step 4: Simplify right side
   127.48x = 20,914.83
5. Step 5: Solve for x
   x = 20,914.83/127.48
6. Step 6: Final answer
   x = 164.06