Finding the Fourth Proportional to 21,601.96, 32,401.85 and 8,456.74

Step by Step Solution

1. Step 1: Write the proportion equation
   21,601.96 : 32,401.85 = 8,456.74 : x
2. Step 2: Convert to fraction form
   21,601.96/32,401.85 = 8,456.74/x
3. Step 3: Cross multiply
   21,601.96x = 32,401.85 × 8,456.74
4. Step 4: Simplify right side
   21,601.96x = 274,013,858.96
5. Step 5: Solve for x
   x = 274,013,858.96/21,601.96
6. Step 6: Final answer
   x = 12,684.68