Finding the Fourth Proportional to 90.38, 134.59 and 89.37

Step by Step Solution

1. Step 1: Write the proportion equation
   90.38 : 134.59 = 89.37 : x
2. Step 2: Convert to fraction form
   90.38/134.59 = 89.37/x
3. Step 3: Cross multiply
   90.38x = 134.59 × 89.37
4. Step 4: Simplify right side
   90.38x = 12,027.64
5. Step 5: Solve for x
   x = 12,027.64/90.38
6. Step 6: Final answer
   x = 133.08