Finding the Fourth Proportional to 111.74, 154.06 and 72.33

Step by Step Solution

1. Step 1: Write the proportion equation
   111.74 : 154.06 = 72.33 : x
2. Step 2: Convert to fraction form
   111.74/154.06 = 72.33/x
3. Step 3: Cross multiply
   111.74x = 154.06 × 72.33
4. Step 4: Simplify right side
   111.74x = 11,142.03
5. Step 5: Solve for x
   x = 11,142.03/111.74
6. Step 6: Final answer
   x = 99.72