Finding the Fourth Proportional to 59.46, 88.58 and 57.42

Step by Step Solution

1. Step 1: Write the proportion equation
   59.46 : 88.58 = 57.42 : x
2. Step 2: Convert to fraction form
   59.46/88.58 = 57.42/x
3. Step 3: Cross multiply
   59.46x = 88.58 × 57.42
4. Step 4: Simplify right side
   59.46x = 5,085.98
5. Step 5: Solve for x
   x = 5,085.98/59.46
6. Step 6: Final answer
   x = 85.54