Finding the Fourth Proportional to 8,206.72, 12,311.29 and 3,012.19

Step by Step Solution

1. Step 1: Write the proportion equation
   8,206.72 : 12,311.29 = 3,012.19 : x
2. Step 2: Convert to fraction form
   8,206.72/12,311.29 = 3,012.19/x
3. Step 3: Cross multiply
   8,206.72x = 12,311.29 × 3,012.19
4. Step 4: Simplify right side
   8,206.72x = 37,083,917.61
5. Step 5: Solve for x
   x = 37,083,917.61/8,206.72
6. Step 6: Final answer
   x = 4,518.73