Finding the Fourth Proportional to 111.16, 153.42 and 91.36

Step by Step Solution

1. Step 1: Write the proportion equation
   111.16 : 153.42 = 91.36 : x
2. Step 2: Convert to fraction form
   111.16/153.42 = 91.36/x
3. Step 3: Cross multiply
   111.16x = 153.42 × 91.36
4. Step 4: Simplify right side
   111.16x = 14,016.45
5. Step 5: Solve for x
   x = 14,016.45/111.16
6. Step 6: Final answer
   x = 126.09