Finding the Fourth Proportional to 12,804.62, 17,667.33 and 7,215.62

Step by Step Solution

1. Step 1: Write the proportion equation
   12,804.62 : 17,667.33 = 7,215.62 : x
2. Step 2: Convert to fraction form
   12,804.62/17,667.33 = 7,215.62/x
3. Step 3: Cross multiply
   12,804.62x = 17,667.33 × 7,215.62
4. Step 4: Simplify right side
   12,804.62x = 127,480,739.69
5. Step 5: Solve for x
   x = 127,480,739.69/12,804.62
6. Step 6: Final answer
   x = 9,955.84