Finding the Fourth Proportional to 16,456.48, 24,688.42 and 7,686.60

Step by Step Solution

1. Step 1: Write the proportion equation
   16,456.48 : 24,688.42 = 7,686.60 : x
2. Step 2: Convert to fraction form
   16,456.48/24,688.42 = 7,686.60/x
3. Step 3: Cross multiply
   16,456.48x = 24,688.42 × 7,686.60
4. Step 4: Simplify right side
   16,456.48x = 189,770,009.17
5. Step 5: Solve for x
   x = 189,770,009.17/16,456.48
6. Step 6: Final answer
   x = 11,531.63