Finding the Fourth Proportional to 16,998.72, 25,513.59 and 8,684.49

Step by Step Solution

1. Step 1: Write the proportion equation
   16,998.72 : 25,513.59 = 8,684.49 : x
2. Step 2: Convert to fraction form
   16,998.72/25,513.59 = 8,684.49/x
3. Step 3: Cross multiply
   16,998.72x = 25,513.59 × 8,684.49
4. Step 4: Simplify right side
   16,998.72x = 221,572,517.22
5. Step 5: Solve for x
   x = 221,572,517.22/16,998.72
6. Step 6: Final answer
   x = 13,034.66