Finding the Fourth Proportional to 109.75, 164.61 and 28.59

Step by Step Solution

1. Step 1: Write the proportion equation
   109.75 : 164.61 = 28.59 : x
2. Step 2: Convert to fraction form
   109.75/164.61 = 28.59/x
3. Step 3: Cross multiply
   109.75x = 164.61 × 28.59
4. Step 4: Simplify right side
   109.75x = 4,706.89
5. Step 5: Solve for x
   x = 4,706.89/109.75
6. Step 6: Final answer
   x = 42.89