Finding the Fourth Proportional to 15,682.46, 21,641.72 and 8,608.82

Step by Step Solution

1. Step 1: Write the proportion equation
   15,682.46 : 21,641.72 = 8,608.82 : x
2. Step 2: Convert to fraction form
   15,682.46/21,641.72 = 8,608.82/x
3. Step 3: Cross multiply
   15,682.46x = 21,641.72 × 8,608.82
4. Step 4: Simplify right side
   15,682.46x = 186,309,520.72
5. Step 5: Solve for x
   x = 186,309,520.72/15,682.46
6. Step 6: Final answer
   x = 11,880.12