Finding the Fourth Proportional to 21,179.25, 31,818.51 and 19,982.38

Step by Step Solution

1. Step 1: Write the proportion equation
   21,179.25 : 31,818.51 = 19,982.38 : x
2. Step 2: Convert to fraction form
   21,179.25/31,818.51 = 19,982.38/x
3. Step 3: Cross multiply
   21,179.25x = 31,818.51 × 19,982.38
4. Step 4: Simplify right side
   21,179.25x = 635,809,594.17
5. Step 5: Solve for x
   x = 635,809,594.17/21,179.25
6. Step 6: Final answer
   x = 30,020.41