Finding the Fourth Proportional to 12,809.01, 17,676.54 and 7,144.12

Step by Step Solution

1. Step 1: Write the proportion equation
   12,809.01 : 17,676.54 = 7,144.12 : x
2. Step 2: Convert to fraction form
   12,809.01/17,676.54 = 7,144.12/x
3. Step 3: Cross multiply
   12,809.01x = 17,676.54 × 7,144.12
4. Step 4: Simplify right side
   12,809.01x = 126,283,322.94
5. Step 5: Solve for x
   x = 126,283,322.94/12,809.01
6. Step 6: Final answer
   x = 9,858.94