Finding the Fourth Proportional to 12,804.81, 17,669.52 and 7,769.25

Step by Step Solution

1. Step 1: Write the proportion equation
   12,804.81 : 17,669.52 = 7,769.25 : x
2. Step 2: Convert to fraction form
   12,804.81/17,669.52 = 7,769.25/x
3. Step 3: Cross multiply
   12,804.81x = 17,669.52 × 7,769.25
4. Step 4: Simplify right side
   12,804.81x = 137,278,918.26
5. Step 5: Solve for x
   x = 137,278,918.26/12,804.81
6. Step 6: Final answer
   x = 10,720.89