Finding the Fourth Proportional to 127.31, 191.16 and 112.23

Step by Step Solution

1. Step 1: Write the proportion equation
   127.31 : 191.16 = 112.23 : x
2. Step 2: Convert to fraction form
   127.31/191.16 = 112.23/x
3. Step 3: Cross multiply
   127.31x = 191.16 × 112.23
4. Step 4: Simplify right side
   127.31x = 21,453.89
5. Step 5: Solve for x
   x = 21,453.89/127.31
6. Step 6: Final answer
   x = 168.52