Finding the Fourth Proportional to 89.35, 133.89 and 43.09

Step by Step Solution

1. Step 1: Write the proportion equation
   89.35 : 133.89 = 43.09 : x
2. Step 2: Convert to fraction form
   89.35/133.89 = 43.09/x
3. Step 3: Cross multiply
   89.35x = 133.89 × 43.09
4. Step 4: Simplify right side
   89.35x = 5,768.82
5. Step 5: Solve for x
   x = 5,768.82/89.35
6. Step 6: Final answer
   x = 64.57