Finding the Fourth Proportional to 89.01, 122.89 and 57.94

Step by Step Solution

1. Step 1: Write the proportion equation
   89.01 : 122.89 = 57.94 : x
2. Step 2: Convert to fraction form
   89.01/122.89 = 57.94/x
3. Step 3: Cross multiply
   89.01x = 122.89 × 57.94
4. Step 4: Simplify right side
   89.01x = 7,120.25
5. Step 5: Solve for x
   x = 7,120.25/89.01
6. Step 6: Final answer
   x = 79.99