Finding the Fourth Proportional to 21,758.94, 30,031.79 and 12,329.33

Step by Step Solution

1. Step 1: Write the proportion equation
   21,758.94 : 30,031.79 = 12,329.33 : x
2. Step 2: Convert to fraction form
   21,758.94/30,031.79 = 12,329.33/x
3. Step 3: Cross multiply
   21,758.94x = 30,031.79 × 12,329.33
4. Step 4: Simplify right side
   21,758.94x = 370,271,637.60
5. Step 5: Solve for x
   x = 370,271,637.60/21,758.94
6. Step 6: Final answer
   x = 17,016.99