Finding the Fourth Proportional to 21,968.82, 30,318.71 and 12,537.18

Step by Step Solution

1. Step 1: Write the proportion equation
   21,968.82 : 30,318.71 = 12,537.18 : x
2. Step 2: Convert to fraction form
   21,968.82/30,318.71 = 12,537.18/x
3. Step 3: Cross multiply
   21,968.82x = 30,318.71 × 12,537.18
4. Step 4: Simplify right side
   21,968.82x = 380,111,061.95
5. Step 5: Solve for x
   x = 380,111,061.95/21,968.82
6. Step 6: Final answer
   x = 17,302.30