Finding the Fourth Proportional to 12,806.15, 17,672.18 and 7,141.43

Step by Step Solution

1. Step 1: Write the proportion equation
   12,806.15 : 17,672.18 = 7,141.43 : x
2. Step 2: Convert to fraction form
   12,806.15/17,672.18 = 7,141.43/x
3. Step 3: Cross multiply
   12,806.15x = 17,672.18 × 7,141.43
4. Step 4: Simplify right side
   12,806.15x = 126,204,644.89
5. Step 5: Solve for x
   x = 126,204,644.89/12,806.15
6. Step 6: Final answer
   x = 9,855.01