Finding the Fourth Proportional to 72.81, 109.09 and 32.18

Step by Step Solution

1. Step 1: Write the proportion equation
   72.81 : 109.09 = 32.18 : x
2. Step 2: Convert to fraction form
   72.81/109.09 = 32.18/x
3. Step 3: Cross multiply
   72.81x = 109.09 × 32.18
4. Step 4: Simplify right side
   72.81x = 3,510.52
5. Step 5: Solve for x
   x = 3,510.52/72.81
6. Step 6: Final answer
   x = 48.21