Finding the Fourth Proportional to 21,672.56, 32,508.78 and 8,166.24

Step by Step Solution

1. Step 1: Write the proportion equation
   21,672.56 : 32,508.78 = 8,166.24 : x
2. Step 2: Convert to fraction form
   21,672.56/32,508.78 = 8,166.24/x
3. Step 3: Cross multiply
   21,672.56x = 32,508.78 × 8,166.24
4. Step 4: Simplify right side
   21,672.56x = 265,474,499.59
5. Step 5: Solve for x
   x = 265,474,499.59/21,672.56
6. Step 6: Final answer
   x = 12,249.34