Finding the Fourth Proportional to 69.76, 104.52 and 42.63

Step by Step Solution

1. Step 1: Write the proportion equation
   69.76 : 104.52 = 42.63 : x
2. Step 2: Convert to fraction form
   69.76/104.52 = 42.63/x
3. Step 3: Cross multiply
   69.76x = 104.52 × 42.63
4. Step 4: Simplify right side
   69.76x = 4,455.46
5. Step 5: Solve for x
   x = 4,455.46/69.76
6. Step 6: Final answer
   x = 63.87