Finding the Fourth Proportional to 89.49, 134.25 and 28.63

Step by Step Solution

1. Step 1: Write the proportion equation
   89.49 : 134.25 = 28.63 : x
2. Step 2: Convert to fraction form
   89.49/134.25 = 28.63/x
3. Step 3: Cross multiply
   89.49x = 134.25 × 28.63
4. Step 4: Simplify right side
   89.49x = 3,843.58
5. Step 5: Solve for x
   x = 3,843.58/89.49
6. Step 6: Final answer
   x = 42.95