Finding the Fourth Proportional to 127.73, 175.91 and 109.31

Step by Step Solution

1. Step 1: Write the proportion equation
   127.73 : 175.91 = 109.31 : x
2. Step 2: Convert to fraction form
   127.73/175.91 = 109.31/x
3. Step 3: Cross multiply
   127.73x = 175.91 × 109.31
4. Step 4: Simplify right side
   127.73x = 19,227.30
5. Step 5: Solve for x
   x = 19,227.30/127.73
6. Step 6: Final answer
   x = 150.53