Finding the Fourth Proportional to 16,961.69, 25,458.06 and 8,647.67

Step by Step Solution

1. Step 1: Write the proportion equation
   16,961.69 : 25,458.06 = 8,647.67 : x
2. Step 2: Convert to fraction form
   16,961.69/25,458.06 = 8,647.67/x
3. Step 3: Cross multiply
   16,961.69x = 25,458.06 × 8,647.67
4. Step 4: Simplify right side
   16,961.69x = 220,152,901.72
5. Step 5: Solve for x
   x = 220,152,901.72/16,961.69
6. Step 6: Final answer
   x = 12,979.42