Finding the Fourth Proportional to 16,711.80, 23,058.60 and 9,636.72

Step by Step Solution

1. Step 1: Write the proportion equation
   16,711.80 : 23,058.60 = 9,636.72 : x
2. Step 2: Convert to fraction form
   16,711.80/23,058.60 = 9,636.72/x
3. Step 3: Cross multiply
   16,711.80x = 23,058.60 × 9,636.72
4. Step 4: Simplify right side
   16,711.80x = 222,209,271.79
5. Step 5: Solve for x
   x = 222,209,271.79/16,711.80
6. Step 6: Final answer
   x = 13,296.55