Finding the Fourth Proportional to 16,751.73, 25,128.15 and 8,427.21

Step by Step Solution

1. Step 1: Write the proportion equation
   16,751.73 : 25,128.15 = 8,427.21 : x
2. Step 2: Convert to fraction form
   16,751.73/25,128.15 = 8,427.21/x
3. Step 3: Cross multiply
   16,751.73x = 25,128.15 × 8,427.21
4. Step 4: Simplify right side
   16,751.73x = 211,760,196.96
5. Step 5: Solve for x
   x = 211,760,196.96/16,751.73
6. Step 6: Final answer
   x = 12,641.09