Finding the Fourth Proportional to 111.39, 153.72 and 67.73

Step by Step Solution

1. Step 1: Write the proportion equation
   111.39 : 153.72 = 67.73 : x
2. Step 2: Convert to fraction form
   111.39/153.72 = 67.73/x
3. Step 3: Cross multiply
   111.39x = 153.72 × 67.73
4. Step 4: Simplify right side
   111.39x = 10,411.46
5. Step 5: Solve for x
   x = 10,411.46/111.39
6. Step 6: Final answer
   x = 93.47