Finding the Fourth Proportional to 16,809.48, 23,196.18 and 9,357

Step by Step Solution

1. Step 1: Write the proportion equation
   16,809.48 : 23,196.18 = 9,357 : x
2. Step 2: Convert to fraction form
   16,809.48/23,196.18 = 9,357/x
3. Step 3: Cross multiply
   16,809.48x = 23,196.18 × 9,357
4. Step 4: Simplify right side
   16,809.48x = 217,046,656.26
5. Step 5: Solve for x
   x = 217,046,656.26/16,809.48
6. Step 6: Final answer
   x = 12,912.16