Finding the Fourth Proportional to 89.41, 133.94 and 57.25

Step by Step Solution

1. Step 1: Write the proportion equation
   89.41 : 133.94 = 57.25 : x
2. Step 2: Convert to fraction form
   89.41/133.94 = 57.25/x
3. Step 3: Cross multiply
   89.41x = 133.94 × 57.25
4. Step 4: Simplify right side
   89.41x = 7,667.78
5. Step 5: Solve for x
   x = 7,667.78/89.41
6. Step 6: Final answer
   x = 85.76