Finding the Fourth Proportional to 21,976.98, 30,326.31 and 13,022.97

Step by Step Solution

1. Step 1: Write the proportion equation
   21,976.98 : 30,326.31 = 13,022.97 : x
2. Step 2: Convert to fraction form
   21,976.98/30,326.31 = 13,022.97/x
3. Step 3: Cross multiply
   21,976.98x = 30,326.31 × 13,022.97
4. Step 4: Simplify right side
   21,976.98x = 394,938,625.34
5. Step 5: Solve for x
   x = 394,938,625.34/21,976.98
6. Step 6: Final answer
   x = 17,970.56