Finding the Fourth Proportional to 42.48, 63.72 and 34.47

Step by Step Solution

1. Step 1: Write the proportion equation
   42.48 : 63.72 = 34.47 : x
2. Step 2: Convert to fraction form
   42.48/63.72 = 34.47/x
3. Step 3: Cross multiply
   42.48x = 63.72 × 34.47
4. Step 4: Simplify right side
   42.48x = 2,196.43
5. Step 5: Solve for x
   x = 2,196.43/42.48
6. Step 6: Final answer
   x = 51.71