Finding the Fourth Proportional to 79.72, 119.59 and 43.61

Step by Step Solution

1. Step 1: Write the proportion equation
   79.72 : 119.59 = 43.61 : x
2. Step 2: Convert to fraction form
   79.72/119.59 = 43.61/x
3. Step 3: Cross multiply
   79.72x = 119.59 × 43.61
4. Step 4: Simplify right side
   79.72x = 5,214.61
5. Step 5: Solve for x
   x = 5,214.61/79.72
6. Step 6: Final answer
   x = 65.41