Finding the Fourth Proportional to 8,206.80, 12,312.24 and 3,012.72

Step by Step Solution

1. Step 1: Write the proportion equation
   8,206.80 : 12,312.24 = 3,012.72 : x
2. Step 2: Convert to fraction form
   8,206.80/12,312.24 = 3,012.72/x
3. Step 3: Cross multiply
   8,206.80x = 12,312.24 × 3,012.72
4. Step 4: Simplify right side
   8,206.80x = 37,093,331.69
5. Step 5: Solve for x
   x = 37,093,331.69/8,206.80
6. Step 6: Final answer
   x = 4,519.83