Finding the Fourth Proportional to 80,306.78, 120,479.31 and 27,716.72

Step by Step Solution

1. Step 1: Write the proportion equation
   80,306.78 : 120,479.31 = 27,716.72 : x
2. Step 2: Convert to fraction form
   80,306.78/120,479.31 = 27,716.72/x
3. Step 3: Cross multiply
   80,306.78x = 120,479.31 × 27,716.72
4. Step 4: Simplify right side
   80,306.78x = 3,339,291,301.06
5. Step 5: Solve for x
   x = 3,339,291,301.06/80,306.78
6. Step 6: Final answer
   x = 41,581.69