Finding the Fourth Proportional to 89.42, 123.44 and 57.94

Step by Step Solution

1. Step 1: Write the proportion equation
   89.42 : 123.44 = 57.94 : x
2. Step 2: Convert to fraction form
   89.42/123.44 = 57.94/x
3. Step 3: Cross multiply
   89.42x = 123.44 × 57.94
4. Step 4: Simplify right side
   89.42x = 7,151.94
5. Step 5: Solve for x
   x = 7,151.94/89.42
6. Step 6: Final answer
   x = 79.98