Finding the Fourth Proportional to 10,687.68, 16,014.72 and 8,219.52

Step by Step Solution

1. Step 1: Write the proportion equation
   10,687.68 : 16,014.72 = 8,219.52 : x
2. Step 2: Convert to fraction form
   10,687.68/16,014.72 = 8,219.52/x
3. Step 3: Cross multiply
   10,687.68x = 16,014.72 × 8,219.52
4. Step 4: Simplify right side
   10,687.68x = 131,633,311.33
5. Step 5: Solve for x
   x = 131,633,311.33/10,687.68
6. Step 6: Final answer
   x = 12,316.36