Finding the Fourth Proportional to 42.74, 63.56 and 42.27

Step by Step Solution

1. Step 1: Write the proportion equation
   42.74 : 63.56 = 42.27 : x
2. Step 2: Convert to fraction form
   42.74/63.56 = 42.27/x
3. Step 3: Cross multiply
   42.74x = 63.56 × 42.27
4. Step 4: Simplify right side
   42.74x = 2,686.68
5. Step 5: Solve for x
   x = 2,686.68/42.74
6. Step 6: Final answer
   x = 62.86