Finding the Fourth Proportional to 111.09, 152.84 and 108.05

Step by Step Solution

1. Step 1: Write the proportion equation
   111.09 : 152.84 = 108.05 : x
2. Step 2: Convert to fraction form
   111.09/152.84 = 108.05/x
3. Step 3: Cross multiply
   111.09x = 152.84 × 108.05
4. Step 4: Simplify right side
   111.09x = 16,513.82
5. Step 5: Solve for x
   x = 16,513.82/111.09
6. Step 6: Final answer
   x = 148.65