Finding the Fourth Proportional to 12,817.69, 17,684.27 and 7,151.51

Step by Step Solution

1. Step 1: Write the proportion equation
   12,817.69 : 17,684.27 = 7,151.51 : x
2. Step 2: Convert to fraction form
   12,817.69/17,684.27 = 7,151.51/x
3. Step 3: Cross multiply
   12,817.69x = 17,684.27 × 7,151.51
4. Step 4: Simplify right side
   12,817.69x = 126,469,242.20
5. Step 5: Solve for x
   x = 126,469,242.20/12,817.69
6. Step 6: Final answer
   x = 9,866.78