Finding the Fourth Proportional to 21,654.72, 32,469.76 and 8,499.91

Step by Step Solution

1. Step 1: Write the proportion equation
   21,654.72 : 32,469.76 = 8,499.91 : x
2. Step 2: Convert to fraction form
   21,654.72/32,469.76 = 8,499.91/x
3. Step 3: Cross multiply
   21,654.72x = 32,469.76 × 8,499.91
4. Step 4: Simplify right side
   21,654.72x = 275,990,037.72
5. Step 5: Solve for x
   x = 275,990,037.72/21,654.72
6. Step 6: Final answer
   x = 12,745.03