Finding the Fourth Proportional to 12,818.82, 17,689.47 and 7,153.29

Step by Step Solution

1. Step 1: Write the proportion equation
   12,818.82 : 17,689.47 = 7,153.29 : x
2. Step 2: Convert to fraction form
   12,818.82/17,689.47 = 7,153.29/x
3. Step 3: Cross multiply
   12,818.82x = 17,689.47 × 7,153.29
4. Step 4: Simplify right side
   12,818.82x = 126,537,908.86
5. Step 5: Solve for x
   x = 126,537,908.86/12,818.82
6. Step 6: Final answer
   x = 9,871.26