Finding the Fourth Proportional to 22,431.30, 33,647.85 and 8,389.89

Step by Step Solution

1. Step 1: Write the proportion equation
   22,431.30 : 33,647.85 = 8,389.89 : x
2. Step 2: Convert to fraction form
   22,431.30/33,647.85 = 8,389.89/x
3. Step 3: Cross multiply
   22,431.30x = 33,647.85 × 8,389.89
4. Step 4: Simplify right side
   22,431.30x = 282,301,760.24
5. Step 5: Solve for x
   x = 282,301,760.24/22,431.30
6. Step 6: Final answer
   x = 12,585.17