Finding the Fourth Proportional to 10,198.48, 14,072.76 and 5,721.30

Step by Step Solution

1. Step 1: Write the proportion equation
   10,198.48 : 14,072.76 = 5,721.30 : x
2. Step 2: Convert to fraction form
   10,198.48/14,072.76 = 5,721.30/x
3. Step 3: Cross multiply
   10,198.48x = 14,072.76 × 5,721.30
4. Step 4: Simplify right side
   10,198.48x = 80,514,481.79
5. Step 5: Solve for x
   x = 80,514,481.79/10,198.48
6. Step 6: Final answer
   x = 7,894.75