Finding the Fourth Proportional to 42.27, 63.38 and 34.15

Step by Step Solution

1. Step 1: Write the proportion equation
   42.27 : 63.38 = 34.15 : x
2. Step 2: Convert to fraction form
   42.27/63.38 = 34.15/x
3. Step 3: Cross multiply
   42.27x = 63.38 × 34.15
4. Step 4: Simplify right side
   42.27x = 2,164.45
5. Step 5: Solve for x
   x = 2,164.45/42.27
6. Step 6: Final answer
   x = 51.21