Finding the Fourth Proportional to 13,851.54, 19,122.89 and 9,144.09

Step by Step Solution

1. Step 1: Write the proportion equation
   13,851.54 : 19,122.89 = 9,144.09 : x
2. Step 2: Convert to fraction form
   13,851.54/19,122.89 = 9,144.09/x
3. Step 3: Cross multiply
   13,851.54x = 19,122.89 × 9,144.09
4. Step 4: Simplify right side
   13,851.54x = 174,861,381.50
5. Step 5: Solve for x
   x = 174,861,381.50/13,851.54
6. Step 6: Final answer
   x = 12,623.97