Finding the Fourth Proportional to 89.37, 133.99 and 53.33

Step by Step Solution

1. Step 1: Write the proportion equation
   89.37 : 133.99 = 53.33 : x
2. Step 2: Convert to fraction form
   89.37/133.99 = 53.33/x
3. Step 3: Cross multiply
   89.37x = 133.99 × 53.33
4. Step 4: Simplify right side
   89.37x = 7,144.88
5. Step 5: Solve for x
   x = 7,144.88/89.37
6. Step 6: Final answer
   x = 79.95