Finding the Fourth Proportional to 115.82, 173.67 and 42.71

Step by Step Solution

1. Step 1: Write the proportion equation
   115.82 : 173.67 = 42.71 : x
2. Step 2: Convert to fraction form
   115.82/173.67 = 42.71/x
3. Step 3: Cross multiply
   115.82x = 173.67 × 42.71
4. Step 4: Simplify right side
   115.82x = 7,417.45
5. Step 5: Solve for x
   x = 7,417.45/115.82
6. Step 6: Final answer
   x = 64.04