Finding the Fourth Proportional to 111.38, 153.57 and 91.94

Step by Step Solution

1. Step 1: Write the proportion equation
   111.38 : 153.57 = 91.94 : x
2. Step 2: Convert to fraction form
   111.38/153.57 = 91.94/x
3. Step 3: Cross multiply
   111.38x = 153.57 × 91.94
4. Step 4: Simplify right side
   111.38x = 14,119.23
5. Step 5: Solve for x
   x = 14,119.23/111.38
6. Step 6: Final answer
   x = 126.77