Finding the Fourth Proportional to 8,591.27, 12,817.04 and 8,480.70

Step by Step Solution

1. Step 1: Write the proportion equation
   8,591.27 : 12,817.04 = 8,480.70 : x
2. Step 2: Convert to fraction form
   8,591.27/12,817.04 = 8,480.70/x
3. Step 3: Cross multiply
   8,591.27x = 12,817.04 × 8,480.70
4. Step 4: Simplify right side
   8,591.27x = 108,697,428.72
5. Step 5: Solve for x
   x = 108,697,428.72/8,591.27
6. Step 6: Final answer
   x = 12,652.09