Finding the Fourth Proportional to 109.89, 164.82 and 28.74

Step by Step Solution

1. Step 1: Write the proportion equation
   109.89 : 164.82 = 28.74 : x
2. Step 2: Convert to fraction form
   109.89/164.82 = 28.74/x
3. Step 3: Cross multiply
   109.89x = 164.82 × 28.74
4. Step 4: Simplify right side
   109.89x = 4,736.83
5. Step 5: Solve for x
   x = 4,736.83/109.89
6. Step 6: Final answer
   x = 43.10