Finding the Fourth Proportional to 21,488.09, 32,170.03 and 12,576.29

Step by Step Solution

1. Step 1: Write the proportion equation
   21,488.09 : 32,170.03 = 12,576.29 : x
2. Step 2: Convert to fraction form
   21,488.09/32,170.03 = 12,576.29/x
3. Step 3: Cross multiply
   21,488.09x = 32,170.03 × 12,576.29
4. Step 4: Simplify right side
   21,488.09x = 404,579,626.59
5. Step 5: Solve for x
   x = 404,579,626.59/21,488.09
6. Step 6: Final answer
   x = 18,828.09