Finding the Fourth Proportional to 16,721.47, 23,075.52 and 9,168.12

Step by Step Solution

1. Step 1: Write the proportion equation
   16,721.47 : 23,075.52 = 9,168.12 : x
2. Step 2: Convert to fraction form
   16,721.47/23,075.52 = 9,168.12/x
3. Step 3: Cross multiply
   16,721.47x = 23,075.52 × 9,168.12
4. Step 4: Simplify right side
   16,721.47x = 211,559,021.04
5. Step 5: Solve for x
   x = 211,559,021.04/16,721.47
6. Step 6: Final answer
   x = 12,651.94