Finding the Fourth Proportional to 43.26, 59.42 and 42.58

Step by Step Solution

1. Step 1: Write the proportion equation
   43.26 : 59.42 = 42.58 : x
2. Step 2: Convert to fraction form
   43.26/59.42 = 42.58/x
3. Step 3: Cross multiply
   43.26x = 59.42 × 42.58
4. Step 4: Simplify right side
   43.26x = 2,530.10
5. Step 5: Solve for x
   x = 2,530.10/43.26
6. Step 6: Final answer
   x = 58.49