Finding the Fourth Proportional to 17,106.72, 25,660.06 and 12,456.32

Step by Step Solution

1. Step 1: Write the proportion equation
   17,106.72 : 25,660.06 = 12,456.32 : x
2. Step 2: Convert to fraction form
   17,106.72/25,660.06 = 12,456.32/x
3. Step 3: Cross multiply
   17,106.72x = 25,660.06 × 12,456.32
4. Step 4: Simplify right side
   17,106.72x = 319,629,918.58
5. Step 5: Solve for x
   x = 319,629,918.58/17,106.72
6. Step 6: Final answer
   x = 18,684.47