Finding the Fourth Proportional to 12,424.39, 17,142.84 and 9,069.03

Step by Step Solution

1. Step 1: Write the proportion equation
   12,424.39 : 17,142.84 = 9,069.03 : x
2. Step 2: Convert to fraction form
   12,424.39/17,142.84 = 9,069.03/x
3. Step 3: Cross multiply
   12,424.39x = 17,142.84 × 9,069.03
4. Step 4: Simplify right side
   12,424.39x = 155,468,930.25
5. Step 5: Solve for x
   x = 155,468,930.25/12,424.39
6. Step 6: Final answer
   x = 12,513.21