Finding the Fourth Proportional to 42.46, 63.32 and 39.56

Step by Step Solution

1. Step 1: Write the proportion equation
   42.46 : 63.32 = 39.56 : x
2. Step 2: Convert to fraction form
   42.46/63.32 = 39.56/x
3. Step 3: Cross multiply
   42.46x = 63.32 × 39.56
4. Step 4: Simplify right side
   42.46x = 2,504.42
5. Step 5: Solve for x
   x = 2,504.42/42.46
6. Step 6: Final answer
   x = 58.99