Finding the Fourth Proportional to 8,270.19, 12,411.46 and 3,890.72

Step by Step Solution

1. Step 1: Write the proportion equation
   8,270.19 : 12,411.46 = 3,890.72 : x
2. Step 2: Convert to fraction form
   8,270.19/12,411.46 = 3,890.72/x
3. Step 3: Cross multiply
   8,270.19x = 12,411.46 × 3,890.72
4. Step 4: Simplify right side
   8,270.19x = 48,289,515.65
5. Step 5: Solve for x
   x = 48,289,515.65/8,270.19
6. Step 6: Final answer
   x = 5,838.99