Finding the Fourth Proportional to 49.82, 74.72 and 42.17

Step by Step Solution

1. Step 1: Write the proportion equation
   49.82 : 74.72 = 42.17 : x
2. Step 2: Convert to fraction form
   49.82/74.72 = 42.17/x
3. Step 3: Cross multiply
   49.82x = 74.72 × 42.17
4. Step 4: Simplify right side
   49.82x = 3,150.54
5. Step 5: Solve for x
   x = 3,150.54/49.82
6. Step 6: Final answer
   x = 63.24