Finding the Fourth Proportional to 21,443.67, 29,592.18 and 12,012.21

Step by Step Solution

1. Step 1: Write the proportion equation
   21,443.67 : 29,592.18 = 12,012.21 : x
2. Step 2: Convert to fraction form
   21,443.67/29,592.18 = 12,012.21/x
3. Step 3: Cross multiply
   21,443.67x = 29,592.18 × 12,012.21
4. Step 4: Simplify right side
   21,443.67x = 355,467,480.52
5. Step 5: Solve for x
   x = 355,467,480.52/21,443.67
6. Step 6: Final answer
   x = 16,576.80