Finding the Fourth Proportional to 90.09, 134.15 and 89.82

Step by Step Solution

1. Step 1: Write the proportion equation
   90.09 : 134.15 = 89.82 : x
2. Step 2: Convert to fraction form
   90.09/134.15 = 89.82/x
3. Step 3: Cross multiply
   90.09x = 134.15 × 89.82
4. Step 4: Simplify right side
   90.09x = 12,048.90
5. Step 5: Solve for x
   x = 12,048.90/90.09
6. Step 6: Final answer
   x = 133.74