Finding the Fourth Proportional to 72.43, 108.67 and 31.32

Step by Step Solution

1. Step 1: Write the proportion equation
   72.43 : 108.67 = 31.32 : x
2. Step 2: Convert to fraction form
   72.43/108.67 = 31.32/x
3. Step 3: Cross multiply
   72.43x = 108.67 × 31.32
4. Step 4: Simplify right side
   72.43x = 3,403.54
5. Step 5: Solve for x
   x = 3,403.54/72.43
6. Step 6: Final answer
   x = 46.99