Finding the Fourth Proportional to 16,713.16, 23,069.94 and 9,642.40

Step by Step Solution

1. Step 1: Write the proportion equation
   16,713.16 : 23,069.94 = 9,642.40 : x
2. Step 2: Convert to fraction form
   16,713.16/23,069.94 = 9,642.40/x
3. Step 3: Cross multiply
   16,713.16x = 23,069.94 × 9,642.40
4. Step 4: Simplify right side
   16,713.16x = 222,449,589.46
5. Step 5: Solve for x
   x = 222,449,589.46/16,713.16
6. Step 6: Final answer
   x = 13,309.85