Finding the Fourth Proportional to 12,806.48, 17,672.86 and 7,141.29

Step by Step Solution

1. Step 1: Write the proportion equation
   12,806.48 : 17,672.86 = 7,141.29 : x
2. Step 2: Convert to fraction form
   12,806.48/17,672.86 = 7,141.29/x
3. Step 3: Cross multiply
   12,806.48x = 17,672.86 × 7,141.29
4. Step 4: Simplify right side
   12,806.48x = 126,207,000.54
5. Step 5: Solve for x
   x = 126,207,000.54/12,806.48
6. Step 6: Final answer
   x = 9,854.94