Finding the Fourth Proportional to 108.35, 162.50 and 31.31

Step by Step Solution

1. Step 1: Write the proportion equation
   108.35 : 162.50 = 31.31 : x
2. Step 2: Convert to fraction form
   108.35/162.50 = 31.31/x
3. Step 3: Cross multiply
   108.35x = 162.50 × 31.31
4. Step 4: Simplify right side
   108.35x = 5,087.52
5. Step 5: Solve for x
   x = 5,087.52/108.35
6. Step 6: Final answer
   x = 46.95