Finding the Fourth Proportional to 16,748.88, 23,113.20 and 9,578.72

Step by Step Solution

1. Step 1: Write the proportion equation
   16,748.88 : 23,113.20 = 9,578.72 : x
2. Step 2: Convert to fraction form
   16,748.88/23,113.20 = 9,578.72/x
3. Step 3: Cross multiply
   16,748.88x = 23,113.20 × 9,578.72
4. Step 4: Simplify right side
   16,748.88x = 221,394,871.10
5. Step 5: Solve for x
   x = 221,394,871.10/16,748.88
6. Step 6: Final answer
   x = 13,218.49