Finding the Fourth Proportional to 42.35, 63.50 and 18.32

Step by Step Solution

1. Step 1: Write the proportion equation
   42.35 : 63.50 = 18.32 : x
2. Step 2: Convert to fraction form
   42.35/63.50 = 18.32/x
3. Step 3: Cross multiply
   42.35x = 63.50 × 18.32
4. Step 4: Simplify right side
   42.35x = 1,162.91
5. Step 5: Solve for x
   x = 1,162.91/42.35
6. Step 6: Final answer
   x = 27.46