Finding the Fourth Proportional to 80,016.20, 110,453.46 and 71,618.12

Step by Step Solution

1. Step 1: Write the proportion equation
   80,016.20 : 110,453.46 = 71,618.12 : x
2. Step 2: Convert to fraction form
   80,016.20/110,453.46 = 71,618.12/x
3. Step 3: Cross multiply
   80,016.20x = 110,453.46 × 71,618.12
4. Step 4: Simplify right side
   80,016.20x = 7,910,469,152.70
5. Step 5: Solve for x
   x = 7,910,469,152.70/80,016.20
6. Step 6: Final answer
   x = 98,860.85