Finding the Fourth Proportional to 42.76, 63.74 and 42.49

Step by Step Solution

1. Step 1: Write the proportion equation
   42.76 : 63.74 = 42.49 : x
2. Step 2: Convert to fraction form
   42.76/63.74 = 42.49/x
3. Step 3: Cross multiply
   42.76x = 63.74 × 42.49
4. Step 4: Simplify right side
   42.76x = 2,708.31
5. Step 5: Solve for x
   x = 2,708.31/42.76
6. Step 6: Final answer
   x = 63.34