Finding the Fourth Proportional to 69.69, 104.38 and 42.57

Step by Step Solution

1. Step 1: Write the proportion equation
   69.69 : 104.38 = 42.57 : x
2. Step 2: Convert to fraction form
   69.69/104.38 = 42.57/x
3. Step 3: Cross multiply
   69.69x = 104.38 × 42.57
4. Step 4: Simplify right side
   69.69x = 4,443.46
5. Step 5: Solve for x
   x = 4,443.46/69.69
6. Step 6: Final answer
   x = 63.76