Finding the Fourth Proportional to 72.84, 109.18 and 38.58

Step by Step Solution

1. Step 1: Write the proportion equation
   72.84 : 109.18 = 38.58 : x
2. Step 2: Convert to fraction form
   72.84/109.18 = 38.58/x
3. Step 3: Cross multiply
   72.84x = 109.18 × 38.58
4. Step 4: Simplify right side
   72.84x = 4,212.16
5. Step 5: Solve for x
   x = 4,212.16/72.84
6. Step 6: Final answer
   x = 57.83