Finding the Fourth Proportional to 89.67, 134.42 and 57.17

Step by Step Solution

1. Step 1: Write the proportion equation
   89.67 : 134.42 = 57.17 : x
2. Step 2: Convert to fraction form
   89.67/134.42 = 57.17/x
3. Step 3: Cross multiply
   89.67x = 134.42 × 57.17
4. Step 4: Simplify right side
   89.67x = 7,683.83
5. Step 5: Solve for x
   x = 7,683.83/89.67
6. Step 6: Final answer
   x = 85.69