Finding the Fourth Proportional to 20,538.48, 30,826.96 and 10,684.72

Step by Step Solution

1. Step 1: Write the proportion equation
   20,538.48 : 30,826.96 = 10,684.72 : x
2. Step 2: Convert to fraction form
   20,538.48/30,826.96 = 10,684.72/x
3. Step 3: Cross multiply
   20,538.48x = 30,826.96 × 10,684.72
4. Step 4: Simplify right side
   20,538.48x = 329,377,436.05
5. Step 5: Solve for x
   x = 329,377,436.05/20,538.48
6. Step 6: Final answer
   x = 16,037.09