Finding the Fourth Proportional to 12,419.50, 17,130.23 and 8,169.22

Step by Step Solution

1. Step 1: Write the proportion equation
   12,419.50 : 17,130.23 = 8,169.22 : x
2. Step 2: Convert to fraction form
   12,419.50/17,130.23 = 8,169.22/x
3. Step 3: Cross multiply
   12,419.50x = 17,130.23 × 8,169.22
4. Step 4: Simplify right side
   12,419.50x = 139,940,617.52
5. Step 5: Solve for x
   x = 139,940,617.52/12,419.50
6. Step 6: Final answer
   x = 11,267.81