Finding the Fourth Proportional to 16,116.78, 24,184.76 and 8,721.09

Step by Step Solution

1. Step 1: Write the proportion equation
   16,116.78 : 24,184.76 = 8,721.09 : x
2. Step 2: Convert to fraction form
   16,116.78/24,184.76 = 8,721.09/x
3. Step 3: Cross multiply
   16,116.78x = 24,184.76 × 8,721.09
4. Step 4: Simplify right side
   16,116.78x = 210,917,424.98
5. Step 5: Solve for x
   x = 210,917,424.98/16,116.78
6. Step 6: Final answer
   x = 13,086.82