Finding the Fourth Proportional to 20,868.69, 31,304.73 and 6,828.42

Step by Step Solution

1. Step 1: Write the proportion equation
   20,868.69 : 31,304.73 = 6,828.42 : x
2. Step 2: Convert to fraction form
   20,868.69/31,304.73 = 6,828.42/x
3. Step 3: Cross multiply
   20,868.69x = 31,304.73 × 6,828.42
4. Step 4: Simplify right side
   20,868.69x = 213,761,844.43
5. Step 5: Solve for x
   x = 213,761,844.43/20,868.69
6. Step 6: Final answer
   x = 10,243.18