Finding the Fourth Proportional to 8,589.18, 12,870.72 and 3,906.48

Step by Step Solution

1. Step 1: Write the proportion equation
   8,589.18 : 12,870.72 = 3,906.48 : x
2. Step 2: Convert to fraction form
   8,589.18/12,870.72 = 3,906.48/x
3. Step 3: Cross multiply
   8,589.18x = 12,870.72 × 3,906.48
4. Step 4: Simplify right side
   8,589.18x = 50,279,210.27
5. Step 5: Solve for x
   x = 50,279,210.27/8,589.18
6. Step 6: Final answer
   x = 5,853.78