Finding the Fourth Proportional to 20,568.96, 28,386.24 and 13,499.52

Step by Step Solution

1. Step 1: Write the proportion equation
   20,568.96 : 28,386.24 = 13,499.52 : x
2. Step 2: Convert to fraction form
   20,568.96/28,386.24 = 13,499.52/x
3. Step 3: Cross multiply
   20,568.96x = 28,386.24 × 13,499.52
4. Step 4: Simplify right side
   20,568.96x = 383,200,614.60
5. Step 5: Solve for x
   x = 383,200,614.60/20,568.96
6. Step 6: Final answer
   x = 18,630.04