Finding the Fourth Proportional to 111.48, 153.87 and 67.86

Step by Step Solution

1. Step 1: Write the proportion equation
   111.48 : 153.87 = 67.86 : x
2. Step 2: Convert to fraction form
   111.48/153.87 = 67.86/x
3. Step 3: Cross multiply
   111.48x = 153.87 × 67.86
4. Step 4: Simplify right side
   111.48x = 10,441.62
5. Step 5: Solve for x
   x = 10,441.62/111.48
6. Step 6: Final answer
   x = 93.66