Finding the Fourth Proportional to 111.10, 153.39 and 67.49

Step by Step Solution

1. Step 1: Write the proportion equation
   111.10 : 153.39 = 67.49 : x
2. Step 2: Convert to fraction form
   111.10/153.39 = 67.49/x
3. Step 3: Cross multiply
   111.10x = 153.39 × 67.49
4. Step 4: Simplify right side
   111.10x = 10,352.29
5. Step 5: Solve for x
   x = 10,352.29/111.10
6. Step 6: Final answer
   x = 93.18