Finding the Fourth Proportional to 16,211.94, 22,371.69 and 9,138.34

Step by Step Solution

1. Step 1: Write the proportion equation
   16,211.94 : 22,371.69 = 9,138.34 : x
2. Step 2: Convert to fraction form
   16,211.94/22,371.69 = 9,138.34/x
3. Step 3: Cross multiply
   16,211.94x = 22,371.69 × 9,138.34
4. Step 4: Simplify right side
   16,211.94x = 204,440,109.59
5. Step 5: Solve for x
   x = 204,440,109.59/16,211.94
6. Step 6: Final answer
   x = 12,610.47