Finding the Fourth Proportional to 57.82, 86.59 and 42.35

Step by Step Solution

1. Step 1: Write the proportion equation
   57.82 : 86.59 = 42.35 : x
2. Step 2: Convert to fraction form
   57.82/86.59 = 42.35/x
3. Step 3: Cross multiply
   57.82x = 86.59 × 42.35
4. Step 4: Simplify right side
   57.82x = 3,667.09
5. Step 5: Solve for x
   x = 3,667.09/57.82
6. Step 6: Final answer
   x = 63.42