Finding the Fourth Proportional to 16,717.65, 23,070.42 and 9,644.10

Step by Step Solution

1. Step 1: Write the proportion equation
   16,717.65 : 23,070.42 = 9,644.10 : x
2. Step 2: Convert to fraction form
   16,717.65/23,070.42 = 9,644.10/x
3. Step 3: Cross multiply
   16,717.65x = 23,070.42 × 9,644.10
4. Step 4: Simplify right side
   16,717.65x = 222,493,437.52
5. Step 5: Solve for x
   x = 222,493,437.52/16,717.65
6. Step 6: Final answer
   x = 13,308.89