Finding the Fourth Proportional to 16,904.34, 23,313.78 and 12,665.34

Step by Step Solution

1. Step 1: Write the proportion equation
   16,904.34 : 23,313.78 = 12,665.34 : x
2. Step 2: Convert to fraction form
   16,904.34/23,313.78 = 12,665.34/x
3. Step 3: Cross multiply
   16,904.34x = 23,313.78 × 12,665.34
4. Step 4: Simplify right side
   16,904.34x = 295,276,950.39
5. Step 5: Solve for x
   x = 295,276,950.39/16,904.34
6. Step 6: Final answer
   x = 17,467.52