Finding the Fourth Proportional to 12,804.37, 17,669.75 and 7,139.09

Step by Step Solution

1. Step 1: Write the proportion equation
   12,804.37 : 17,669.75 = 7,139.09 : x
2. Step 2: Convert to fraction form
   12,804.37/17,669.75 = 7,139.09/x
3. Step 3: Cross multiply
   12,804.37x = 17,669.75 × 7,139.09
4. Step 4: Simplify right side
   12,804.37x = 126,145,944.01
5. Step 5: Solve for x
   x = 126,145,944.01/12,804.37
6. Step 6: Final answer
   x = 9,851.79