Finding the Fourth Proportional to 21,817.72, 32,711.98 and 8,666.56

Step by Step Solution

1. Step 1: Write the proportion equation
   21,817.72 : 32,711.98 = 8,666.56 : x
2. Step 2: Convert to fraction form
   21,817.72/32,711.98 = 8,666.56/x
3. Step 3: Cross multiply
   21,817.72x = 32,711.98 × 8,666.56
4. Step 4: Simplify right side
   21,817.72x = 283,500,337.39
5. Step 5: Solve for x
   x = 283,500,337.39/21,817.72
6. Step 6: Final answer
   x = 12,994.04