Finding the Fourth Proportional to 21,644.98, 29,870.15 and 12,084.71

Step by Step Solution

1. Step 1: Write the proportion equation
   21,644.98 : 29,870.15 = 12,084.71 : x
2. Step 2: Convert to fraction form
   21,644.98/29,870.15 = 12,084.71/x
3. Step 3: Cross multiply
   21,644.98x = 29,870.15 × 12,084.71
4. Step 4: Simplify right side
   21,644.98x = 360,971,890.63
5. Step 5: Solve for x
   x = 360,971,890.63/21,644.98
6. Step 6: Final answer
   x = 16,676.94