Finding the Fourth Proportional to 89.24, 133.89 and 53.16

Step by Step Solution

1. Step 1: Write the proportion equation
   89.24 : 133.89 = 53.16 : x
2. Step 2: Convert to fraction form
   89.24/133.89 = 53.16/x
3. Step 3: Cross multiply
   89.24x = 133.89 × 53.16
4. Step 4: Simplify right side
   89.24x = 7,116.89
5. Step 5: Solve for x
   x = 7,116.89/89.24
6. Step 6: Final answer
   x = 79.75