Finding the Fourth Proportional to 21,126.09, 31,687.25 and 6,338.31

Step by Step Solution

1. Step 1: Write the proportion equation
   21,126.09 : 31,687.25 = 6,338.31 : x
2. Step 2: Convert to fraction form
   21,126.09/31,687.25 = 6,338.31/x
3. Step 3: Cross multiply
   21,126.09x = 31,687.25 × 6,338.31
4. Step 4: Simplify right side
   21,126.09x = 200,843,581.86
5. Step 5: Solve for x
   x = 200,843,581.86/21,126.09
6. Step 6: Final answer
   x = 9,506.90