Finding the Fourth Proportional to 89.35, 133.91 and 82.06

Step by Step Solution

1. Step 1: Write the proportion equation
   89.35 : 133.91 = 82.06 : x
2. Step 2: Convert to fraction form
   89.35/133.91 = 82.06/x
3. Step 3: Cross multiply
   89.35x = 133.91 × 82.06
4. Step 4: Simplify right side
   89.35x = 10,987.91
5. Step 5: Solve for x
   x = 10,987.91/89.35
6. Step 6: Final answer
   x = 122.98