Finding the Fourth Proportional to 21,719.24, 32,556.72 and 8,564.32

Step by Step Solution

1. Step 1: Write the proportion equation
   21,719.24 : 32,556.72 = 8,564.32 : x
2. Step 2: Convert to fraction form
   21,719.24/32,556.72 = 8,564.32/x
3. Step 3: Cross multiply
   21,719.24x = 32,556.72 × 8,564.32
4. Step 4: Simplify right side
   21,719.24x = 278,826,168.23
5. Step 5: Solve for x
   x = 278,826,168.23/21,719.24
6. Step 6: Final answer
   x = 12,837.75