Finding the Fourth Proportional to 8,806.89, 12,169.59 and 6,412.69

Step by Step Solution

1. Step 1: Write the proportion equation
   8,806.89 : 12,169.59 = 6,412.69 : x
2. Step 2: Convert to fraction form
   8,806.89/12,169.59 = 6,412.69/x
3. Step 3: Cross multiply
   8,806.89x = 12,169.59 × 6,412.69
4. Step 4: Simplify right side
   8,806.89x = 78,039,766.88
5. Step 5: Solve for x
   x = 78,039,766.88/8,806.89
6. Step 6: Final answer
   x = 8,861.22