Finding the Fourth Proportional to 111.46, 153.83 and 67.20

Step by Step Solution

1. Step 1: Write the proportion equation
   111.46 : 153.83 = 67.20 : x
2. Step 2: Convert to fraction form
   111.46/153.83 = 67.20/x
3. Step 3: Cross multiply
   111.46x = 153.83 × 67.20
4. Step 4: Simplify right side
   111.46x = 10,337.38
5. Step 5: Solve for x
   x = 10,337.38/111.46
6. Step 6: Final answer
   x = 92.75