Finding the Fourth Proportional to 111.38, 153.71 and 67.69

Step by Step Solution

1. Step 1: Write the proportion equation
   111.38 : 153.71 = 67.69 : x
2. Step 2: Convert to fraction form
   111.38/153.71 = 67.69/x
3. Step 3: Cross multiply
   111.38x = 153.71 × 67.69
4. Step 4: Simplify right side
   111.38x = 10,404.41
5. Step 5: Solve for x
   x = 10,404.41/111.38
6. Step 6: Final answer
   x = 93.41