Finding the Fourth Proportional to 42.54, 63.46 and 42.09

Step by Step Solution

1. Step 1: Write the proportion equation
   42.54 : 63.46 = 42.09 : x
2. Step 2: Convert to fraction form
   42.54/63.46 = 42.09/x
3. Step 3: Cross multiply
   42.54x = 63.46 × 42.09
4. Step 4: Simplify right side
   42.54x = 2,671.03
5. Step 5: Solve for x
   x = 2,671.03/42.54
6. Step 6: Final answer
   x = 62.79