Finding the Fourth Proportional to 89.32, 133.94 and 28.43

Step by Step Solution

1. Step 1: Write the proportion equation
   89.32 : 133.94 = 28.43 : x
2. Step 2: Convert to fraction form
   89.32/133.94 = 28.43/x
3. Step 3: Cross multiply
   89.32x = 133.94 × 28.43
4. Step 4: Simplify right side
   89.32x = 3,807.91
5. Step 5: Solve for x
   x = 3,807.91/89.32
6. Step 6: Final answer
   x = 42.63