Finding the Fourth Proportional to 89.47, 134.15 and 28.62

Step by Step Solution

1. Step 1: Write the proportion equation
   89.47 : 134.15 = 28.62 : x
2. Step 2: Convert to fraction form
   89.47/134.15 = 28.62/x
3. Step 3: Cross multiply
   89.47x = 134.15 × 28.62
4. Step 4: Simplify right side
   89.47x = 3,839.23
5. Step 5: Solve for x
   x = 3,839.23/89.47
6. Step 6: Final answer
   x = 42.91