Finding the Fourth Proportional to 21,758.43, 30,029.36 and 12,330.03

Step by Step Solution

1. Step 1: Write the proportion equation
   21,758.43 : 30,029.36 = 12,330.03 : x
2. Step 2: Convert to fraction form
   21,758.43/30,029.36 = 12,330.03/x
3. Step 3: Cross multiply
   21,758.43x = 30,029.36 × 12,330.03
4. Step 4: Simplify right side
   21,758.43x = 370,262,848.03
5. Step 5: Solve for x
   x = 370,262,848.03/21,758.43
6. Step 6: Final answer
   x = 17,016.98