Finding the Fourth Proportional to 59.09, 81.57 and 42.47

Step by Step Solution

1. Step 1: Write the proportion equation
   59.09 : 81.57 = 42.47 : x
2. Step 2: Convert to fraction form
   59.09/81.57 = 42.47/x
3. Step 3: Cross multiply
   59.09x = 81.57 × 42.47
4. Step 4: Simplify right side
   59.09x = 3,464.28
5. Step 5: Solve for x
   x = 3,464.28/59.09
6. Step 6: Final answer
   x = 58.63