Finding the Fourth Proportional to 69.82, 104.78 and 52.81

Step by Step Solution

1. Step 1: Write the proportion equation
   69.82 : 104.78 = 52.81 : x
2. Step 2: Convert to fraction form
   69.82/104.78 = 52.81/x
3. Step 3: Cross multiply
   69.82x = 104.78 × 52.81
4. Step 4: Simplify right side
   69.82x = 5,532.91
5. Step 5: Solve for x
   x = 5,532.91/69.82
6. Step 6: Final answer
   x = 79.25