Finding the Fourth Proportional to 127.29, 190.71 and 91.14

Step by Step Solution

1. Step 1: Write the proportion equation
   127.29 : 190.71 = 91.14 : x
2. Step 2: Convert to fraction form
   127.29/190.71 = 91.14/x
3. Step 3: Cross multiply
   127.29x = 190.71 × 91.14
4. Step 4: Simplify right side
   127.29x = 17,381.31
5. Step 5: Solve for x
   x = 17,381.31/127.29
6. Step 6: Final answer
   x = 136.55