Finding the Fourth Proportional to 42.30, 63.18 and 34.56

Step by Step Solution

1. Step 1: Write the proportion equation
   42.30 : 63.18 = 34.56 : x
2. Step 2: Convert to fraction form
   42.30/63.18 = 34.56/x
3. Step 3: Cross multiply
   42.30x = 63.18 × 34.56
4. Step 4: Simplify right side
   42.30x = 2,183.50
5. Step 5: Solve for x
   x = 2,183.50/42.30
6. Step 6: Final answer
   x = 51.62