Finding the Fourth Proportional to 8,786.28, 12,124.62 and 5,009.60

Step by Step Solution

1. Step 1: Write the proportion equation
   8,786.28 : 12,124.62 = 5,009.60 : x
2. Step 2: Convert to fraction form
   8,786.28/12,124.62 = 5,009.60/x
3. Step 3: Cross multiply
   8,786.28x = 12,124.62 × 5,009.60
4. Step 4: Simplify right side
   8,786.28x = 60,739,496.35
5. Step 5: Solve for x
   x = 60,739,496.35/8,786.28
6. Step 6: Final answer
   x = 6,912.99