Finding the Fourth Proportional to 21,996.98, 30,342.39 and 13,038.49

Step by Step Solution

1. Step 1: Write the proportion equation
   21,996.98 : 30,342.39 = 13,038.49 : x
2. Step 2: Convert to fraction form
   21,996.98/30,342.39 = 13,038.49/x
3. Step 3: Cross multiply
   21,996.98x = 30,342.39 × 13,038.49
4. Step 4: Simplify right side
   21,996.98x = 395,618,905.33
5. Step 5: Solve for x
   x = 395,618,905.33/21,996.98
6. Step 6: Final answer
   x = 17,985.14