Finding the Fourth Proportional to 72.76, 109.18 and 36.69

Step by Step Solution

1. Step 1: Write the proportion equation
   72.76 : 109.18 = 36.69 : x
2. Step 2: Convert to fraction form
   72.76/109.18 = 36.69/x
3. Step 3: Cross multiply
   72.76x = 109.18 × 36.69
4. Step 4: Simplify right side
   72.76x = 4,005.81
5. Step 5: Solve for x
   x = 4,005.81/72.76
6. Step 6: Final answer
   x = 55.06