Finding the Fourth Proportional to 16,682.72, 23,021.15 and 9,511.63

Step by Step Solution

1. Step 1: Write the proportion equation
   16,682.72 : 23,021.15 = 9,511.63 : x
2. Step 2: Convert to fraction form
   16,682.72/23,021.15 = 9,511.63/x
3. Step 3: Cross multiply
   16,682.72x = 23,021.15 × 9,511.63
4. Step 4: Simplify right side
   16,682.72x = 218,968,555.86
5. Step 5: Solve for x
   x = 218,968,555.86/16,682.72
6. Step 6: Final answer
   x = 13,125.47