Finding the Fourth Proportional to 111.28, 153.58 and 67.62

Step by Step Solution

1. Step 1: Write the proportion equation
   111.28 : 153.58 = 67.62 : x
2. Step 2: Convert to fraction form
   111.28/153.58 = 67.62/x
3. Step 3: Cross multiply
   111.28x = 153.58 × 67.62
4. Step 4: Simplify right side
   111.28x = 10,385.08
5. Step 5: Solve for x
   x = 10,385.08/111.28
6. Step 6: Final answer
   x = 93.32