Finding the Fourth Proportional to 16,680.65, 23,018.63 and 9,969.98

Step by Step Solution

1. Step 1: Write the proportion equation
   16,680.65 : 23,018.63 = 9,969.98 : x
2. Step 2: Convert to fraction form
   16,680.65/23,018.63 = 9,969.98/x
3. Step 3: Cross multiply
   16,680.65x = 23,018.63 × 9,969.98
4. Step 4: Simplify right side
   16,680.65x = 229,495,288.42
5. Step 5: Solve for x
   x = 229,495,288.42/16,680.65
6. Step 6: Final answer
   x = 13,758.17