Finding the Fourth Proportional to 70.37, 105.50 and 31.83

Step by Step Solution

1. Step 1: Write the proportion equation
   70.37 : 105.50 = 31.83 : x
2. Step 2: Convert to fraction form
   70.37/105.50 = 31.83/x
3. Step 3: Cross multiply
   70.37x = 105.50 × 31.83
4. Step 4: Simplify right side
   70.37x = 3,357.91
5. Step 5: Solve for x
   x = 3,357.91/70.37
6. Step 6: Final answer
   x = 47.72