Finding the Fourth Proportional to 21,968.34, 30,318.48 and 12,538.32

Step by Step Solution

1. Step 1: Write the proportion equation
   21,968.34 : 30,318.48 = 12,538.32 : x
2. Step 2: Convert to fraction form
   21,968.34/30,318.48 = 12,538.32/x
3. Step 3: Cross multiply
   21,968.34x = 30,318.48 × 12,538.32
4. Step 4: Simplify right side
   21,968.34x = 380,142,804.15
5. Step 5: Solve for x
   x = 380,142,804.15/21,968.34
6. Step 6: Final answer
   x = 17,304.12