Finding the Fourth Proportional to 10,818.69, 16,229.49 and 5,271.31

Step by Step Solution

1. Step 1: Write the proportion equation
   10,818.69 : 16,229.49 = 5,271.31 : x
2. Step 2: Convert to fraction form
   10,818.69/16,229.49 = 5,271.31/x
3. Step 3: Cross multiply
   10,818.69x = 16,229.49 × 5,271.31
4. Step 4: Simplify right side
   10,818.69x = 85,550,672.93
5. Step 5: Solve for x
   x = 85,550,672.93/10,818.69
6. Step 6: Final answer
   x = 7,907.67