Finding the Fourth Proportional to 111.06, 153.24 and 67.40

Step by Step Solution

1. Step 1: Write the proportion equation
   111.06 : 153.24 = 67.40 : x
2. Step 2: Convert to fraction form
   111.06/153.24 = 67.40/x
3. Step 3: Cross multiply
   111.06x = 153.24 × 67.40
4. Step 4: Simplify right side
   111.06x = 10,328.38
5. Step 5: Solve for x
   x = 10,328.38/111.06
6. Step 6: Final answer
   x = 93.00