Finding the Fourth Proportional to 16,711.80, 23,064.60 and 9,638.07

Step by Step Solution

1. Step 1: Write the proportion equation
   16,711.80 : 23,064.60 = 9,638.07 : x
2. Step 2: Convert to fraction form
   16,711.80/23,064.60 = 9,638.07/x
3. Step 3: Cross multiply
   16,711.80x = 23,064.60 × 9,638.07
4. Step 4: Simplify right side
   16,711.80x = 222,298,229.32
5. Step 5: Solve for x
   x = 222,298,229.32/16,711.80
6. Step 6: Final answer
   x = 13,301.87