Finding the Fourth Proportional to 16,721.50, 23,075.68 and 9,269.50

Step by Step Solution

1. Step 1: Write the proportion equation
   16,721.50 : 23,075.68 = 9,269.50 : x
2. Step 2: Convert to fraction form
   16,721.50/23,075.68 = 9,269.50/x
3. Step 3: Cross multiply
   16,721.50x = 23,075.68 × 9,269.50
4. Step 4: Simplify right side
   16,721.50x = 213,900,015.76
5. Step 5: Solve for x
   x = 213,900,015.76/16,721.50
6. Step 6: Final answer
   x = 12,791.92