Finding the Fourth Proportional to 47.98, 71.82 and 42.28

Step by Step Solution

1. Step 1: Write the proportion equation
   47.98 : 71.82 = 42.28 : x
2. Step 2: Convert to fraction form
   47.98/71.82 = 42.28/x
3. Step 3: Cross multiply
   47.98x = 71.82 × 42.28
4. Step 4: Simplify right side
   47.98x = 3,036.55
5. Step 5: Solve for x
   x = 3,036.55/47.98
6. Step 6: Final answer
   x = 63.29