Finding the Fourth Proportional to 111.30, 153.55 and 67.62

Step by Step Solution

1. Step 1: Write the proportion equation
   111.30 : 153.55 = 67.62 : x
2. Step 2: Convert to fraction form
   111.30/153.55 = 67.62/x
3. Step 3: Cross multiply
   111.30x = 153.55 × 67.62
4. Step 4: Simplify right side
   111.30x = 10,383.05
5. Step 5: Solve for x
   x = 10,383.05/111.30
6. Step 6: Final answer
   x = 93.29