Finding the Fourth Proportional to 69.67, 104.50 and 18.31

Step by Step Solution

1. Step 1: Write the proportion equation
   69.67 : 104.50 = 18.31 : x
2. Step 2: Convert to fraction form
   69.67/104.50 = 18.31/x
3. Step 3: Cross multiply
   69.67x = 104.50 × 18.31
4. Step 4: Simplify right side
   69.67x = 1,913.59
5. Step 5: Solve for x
   x = 1,913.59/69.67
6. Step 6: Final answer
   x = 27.47