Finding the Fourth Proportional to 72.84, 109.16 and 36.72

Step by Step Solution

1. Step 1: Write the proportion equation
   72.84 : 109.16 = 36.72 : x
2. Step 2: Convert to fraction form
   72.84/109.16 = 36.72/x
3. Step 3: Cross multiply
   72.84x = 109.16 × 36.72
4. Step 4: Simplify right side
   72.84x = 4,008.17
5. Step 5: Solve for x
   x = 4,008.17/72.84
6. Step 6: Final answer
   x = 55.03