Finding the Fourth Proportional to 21,645.48, 29,870.04 and 12,084.96

Step by Step Solution

1. Step 1: Write the proportion equation
   21,645.48 : 29,870.04 = 12,084.96 : x
2. Step 2: Convert to fraction form
   21,645.48/29,870.04 = 12,084.96/x
3. Step 3: Cross multiply
   21,645.48x = 29,870.04 × 12,084.96
4. Step 4: Simplify right side
   21,645.48x = 360,978,238.60
5. Step 5: Solve for x
   x = 360,978,238.60/21,645.48
6. Step 6: Final answer
   x = 16,676.84