Finding the Fourth Proportional to 72.87, 109.32 and 32.31

Step by Step Solution

1. Step 1: Write the proportion equation
   72.87 : 109.32 = 32.31 : x
2. Step 2: Convert to fraction form
   72.87/109.32 = 32.31/x
3. Step 3: Cross multiply
   72.87x = 109.32 × 32.31
4. Step 4: Simplify right side
   72.87x = 3,532.01
5. Step 5: Solve for x
   x = 3,532.01/72.87
6. Step 6: Final answer
   x = 48.47