Finding the Fourth Proportional to 16,719.80, 23,075.78 and 9,644.84

Step by Step Solution

1. Step 1: Write the proportion equation
   16,719.80 : 23,075.78 = 9,644.84 : x
2. Step 2: Convert to fraction form
   16,719.80/23,075.78 = 9,644.84/x
3. Step 3: Cross multiply
   16,719.80x = 23,075.78 × 9,644.84
4. Step 4: Simplify right side
   16,719.80x = 222,562,205.98
5. Step 5: Solve for x
   x = 222,562,205.98/16,719.80
6. Step 6: Final answer
   x = 13,311.30