Finding the Fourth Proportional to 42.43, 63.35 and 34.31

Step by Step Solution

1. Step 1: Write the proportion equation
   42.43 : 63.35 = 34.31 : x
2. Step 2: Convert to fraction form
   42.43/63.35 = 34.31/x
3. Step 3: Cross multiply
   42.43x = 63.35 × 34.31
4. Step 4: Simplify right side
   42.43x = 2,173.22
5. Step 5: Solve for x
   x = 2,173.22/42.43
6. Step 6: Final answer
   x = 51.23