Finding the Fourth Proportional to 111.84, 154.42 and 74.52

Step by Step Solution

1. Step 1: Write the proportion equation
   111.84 : 154.42 = 74.52 : x
2. Step 2: Convert to fraction form
   111.84/154.42 = 74.52/x
3. Step 3: Cross multiply
   111.84x = 154.42 × 74.52
4. Step 4: Simplify right side
   111.84x = 11,507.38
5. Step 5: Solve for x
   x = 11,507.38/111.84
6. Step 6: Final answer
   x = 102.89