Finding the Fourth Proportional to 59.42, 88.54 and 57.48

Step by Step Solution

1. Step 1: Write the proportion equation
   59.42 : 88.54 = 57.48 : x
2. Step 2: Convert to fraction form
   59.42/88.54 = 57.48/x
3. Step 3: Cross multiply
   59.42x = 88.54 × 57.48
4. Step 4: Simplify right side
   59.42x = 5,089.28
5. Step 5: Solve for x
   x = 5,089.28/59.42
6. Step 6: Final answer
   x = 85.65