Finding the Fourth Proportional to 8,550.72, 12,818.52 and 4,388.40

Step by Step Solution

1. Step 1: Write the proportion equation
   8,550.72 : 12,818.52 = 4,388.40 : x
2. Step 2: Convert to fraction form
   8,550.72/12,818.52 = 4,388.40/x
3. Step 3: Cross multiply
   8,550.72x = 12,818.52 × 4,388.40
4. Step 4: Simplify right side
   8,550.72x = 56,252,793.17
5. Step 5: Solve for x
   x = 56,252,793.17/8,550.72
6. Step 6: Final answer
   x = 6,578.72