Finding the Fourth Proportional to 69.45, 104.17 and 18.10

Step by Step Solution

1. Step 1: Write the proportion equation
   69.45 : 104.17 = 18.10 : x
2. Step 2: Convert to fraction form
   69.45/104.17 = 18.10/x
3. Step 3: Cross multiply
   69.45x = 104.17 × 18.10
4. Step 4: Simplify right side
   69.45x = 1,885.52
5. Step 5: Solve for x
   x = 1,885.52/69.45
6. Step 6: Final answer
   x = 27.15