Finding the Fourth Proportional to 69.82, 104.68 and 42.71

Step by Step Solution

1. Step 1: Write the proportion equation
   69.82 : 104.68 = 42.71 : x
2. Step 2: Convert to fraction form
   69.82/104.68 = 42.71/x
3. Step 3: Cross multiply
   69.82x = 104.68 × 42.71
4. Step 4: Simplify right side
   69.82x = 4,471.38
5. Step 5: Solve for x
   x = 4,471.38/69.82
6. Step 6: Final answer
   x = 64.04