Finding the Fourth Proportional to 16,389.07, 24,561.17 and 12,383.16

Step by Step Solution

1. Step 1: Write the proportion equation
   16,389.07 : 24,561.17 = 12,383.16 : x
2. Step 2: Convert to fraction form
   16,389.07/24,561.17 = 12,383.16/x
3. Step 3: Cross multiply
   16,389.07x = 24,561.17 × 12,383.16
4. Step 4: Simplify right side
   16,389.07x = 304,144,897.90
5. Step 5: Solve for x
   x = 304,144,897.90/16,389.07
6. Step 6: Final answer
   x = 18,557.79