Finding the Fourth Proportional to 111.48, 153.69 and 74.58

Step by Step Solution

1. Step 1: Write the proportion equation
   111.48 : 153.69 = 74.58 : x
2. Step 2: Convert to fraction form
   111.48/153.69 = 74.58/x
3. Step 3: Cross multiply
   111.48x = 153.69 × 74.58
4. Step 4: Simplify right side
   111.48x = 11,462.20
5. Step 5: Solve for x
   x = 11,462.20/111.48
6. Step 6: Final answer
   x = 102.82