Finding the Fourth Proportional to 12,760.50, 17,609.58 and 7,171.50

Step by Step Solution

1. Step 1: Write the proportion equation
   12,760.50 : 17,609.58 = 7,171.50 : x
2. Step 2: Convert to fraction form
   12,760.50/17,609.58 = 7,171.50/x
3. Step 3: Cross multiply
   12,760.50x = 17,609.58 × 7,171.50
4. Step 4: Simplify right side
   12,760.50x = 126,287,102.97
5. Step 5: Solve for x
   x = 126,287,102.97/12,760.50
6. Step 6: Final answer
   x = 9,896.72