Finding the Fourth Proportional to 16,891.59, 23,308.38 and 9,336.90

Step by Step Solution

1. Step 1: Write the proportion equation
   16,891.59 : 23,308.38 = 9,336.90 : x
2. Step 2: Convert to fraction form
   16,891.59/23,308.38 = 9,336.90/x
3. Step 3: Cross multiply
   16,891.59x = 23,308.38 × 9,336.90
4. Step 4: Simplify right side
   16,891.59x = 217,628,100.63
5. Step 5: Solve for x
   x = 217,628,100.63/16,891.59
6. Step 6: Final answer
   x = 12,883.81