Finding the Fourth Proportional to 111.15, 153.39 and 67.48

Step by Step Solution

1. Step 1: Write the proportion equation
   111.15 : 153.39 = 67.48 : x
2. Step 2: Convert to fraction form
   111.15/153.39 = 67.48/x
3. Step 3: Cross multiply
   111.15x = 153.39 × 67.48
4. Step 4: Simplify right side
   111.15x = 10,350.37
5. Step 5: Solve for x
   x = 10,350.37/111.15
6. Step 6: Final answer
   x = 93.12