Finding the Fourth Proportional to 20,682.16, 31,041.15 and 10,828.33

Step by Step Solution

1. Step 1: Write the proportion equation
   20,682.16 : 31,041.15 = 10,828.33 : x
2. Step 2: Convert to fraction form
   20,682.16/31,041.15 = 10,828.33/x
3. Step 3: Cross multiply
   20,682.16x = 31,041.15 × 10,828.33
4. Step 4: Simplify right side
   20,682.16x = 336,123,815.78
5. Step 5: Solve for x
   x = 336,123,815.78/20,682.16
6. Step 6: Final answer
   x = 16,251.87