Finding the Fourth Proportional to 69.76, 104.82 and 42.76

Step by Step Solution

1. Step 1: Write the proportion equation
   69.76 : 104.82 = 42.76 : x
2. Step 2: Convert to fraction form
   69.76/104.82 = 42.76/x
3. Step 3: Cross multiply
   69.76x = 104.82 × 42.76
4. Step 4: Simplify right side
   69.76x = 4,482.10
5. Step 5: Solve for x
   x = 4,482.10/69.76
6. Step 6: Final answer
   x = 64.25