Finding the Fourth Proportional to 16,681.98, 23,017.48 and 9,966.60

Step by Step Solution

1. Step 1: Write the proportion equation
   16,681.98 : 23,017.48 = 9,966.60 : x
2. Step 2: Convert to fraction form
   16,681.98/23,017.48 = 9,966.60/x
3. Step 3: Cross multiply
   16,681.98x = 23,017.48 × 9,966.60
4. Step 4: Simplify right side
   16,681.98x = 229,406,016.17
5. Step 5: Solve for x
   x = 229,406,016.17/16,681.98
6. Step 6: Final answer
   x = 13,751.73