Finding the Fourth Proportional to 13,491.48, 18,609.83 and 8,709.59

Step by Step Solution

1. Step 1: Write the proportion equation
   13,491.48 : 18,609.83 = 8,709.59 : x
2. Step 2: Convert to fraction form
   13,491.48/18,609.83 = 8,709.59/x
3. Step 3: Cross multiply
   13,491.48x = 18,609.83 × 8,709.59
4. Step 4: Simplify right side
   13,491.48x = 162,083,852.67
5. Step 5: Solve for x
   x = 162,083,852.67/13,491.48
6. Step 6: Final answer
   x = 12,013.79