Finding the Fourth Proportional to 21,669.85, 29,903.83 and 12,109.82

Step by Step Solution

1. Step 1: Write the proportion equation
   21,669.85 : 29,903.83 = 12,109.82 : x
2. Step 2: Convert to fraction form
   21,669.85/29,903.83 = 12,109.82/x
3. Step 3: Cross multiply
   21,669.85x = 29,903.83 × 12,109.82
4. Step 4: Simplify right side
   21,669.85x = 362,129,998.61
5. Step 5: Solve for x
   x = 362,129,998.61/21,669.85
6. Step 6: Final answer
   x = 16,711.24