Finding the Fourth Proportional to 111.55, 153.94 and 67.88

Step by Step Solution

1. Step 1: Write the proportion equation
   111.55 : 153.94 = 67.88 : x
2. Step 2: Convert to fraction form
   111.55/153.94 = 67.88/x
3. Step 3: Cross multiply
   111.55x = 153.94 × 67.88
4. Step 4: Simplify right side
   111.55x = 10,449.45
5. Step 5: Solve for x
   x = 10,449.45/111.55
6. Step 6: Final answer
   x = 93.68