Finding the Fourth Proportional to 21,719.27, 32,556.83 and 8,553.53

Step by Step Solution

1. Step 1: Write the proportion equation
   21,719.27 : 32,556.83 = 8,553.53 : x
2. Step 2: Convert to fraction form
   21,719.27/32,556.83 = 8,553.53/x
3. Step 3: Cross multiply
   21,719.27x = 32,556.83 × 8,553.53
4. Step 4: Simplify right side
   21,719.27x = 278,475,616.56
5. Step 5: Solve for x
   x = 278,475,616.56/21,719.27
6. Step 6: Final answer
   x = 12,821.59