Finding the Fourth Proportional to 111.18, 152.98 and 108

Step by Step Solution

1. Step 1: Write the proportion equation
   111.18 : 152.98 = 108 : x
2. Step 2: Convert to fraction form
   111.18/152.98 = 108/x
3. Step 3: Cross multiply
   111.18x = 152.98 × 108
4. Step 4: Simplify right side
   111.18x = 16,521.84
5. Step 5: Solve for x
   x = 16,521.84/111.18
6. Step 6: Final answer
   x = 148.60