Finding the Fourth Proportional to 21,563.02, 29,754.56 and 12,131.38

Step by Step Solution

1. Step 1: Write the proportion equation
   21,563.02 : 29,754.56 = 12,131.38 : x
2. Step 2: Convert to fraction form
   21,563.02/29,754.56 = 12,131.38/x
3. Step 3: Cross multiply
   21,563.02x = 29,754.56 × 12,131.38
4. Step 4: Simplify right side
   21,563.02x = 360,963,874.09
5. Step 5: Solve for x
   x = 360,963,874.09/21,563.02
6. Step 6: Final answer
   x = 16,739.95