Finding the Fourth Proportional to 16,805.72, 23,188.38 and 9,731.72

Step by Step Solution

1. Step 1: Write the proportion equation
   16,805.72 : 23,188.38 = 9,731.72 : x
2. Step 2: Convert to fraction form
   16,805.72/23,188.38 = 9,731.72/x
3. Step 3: Cross multiply
   16,805.72x = 23,188.38 × 9,731.72
4. Step 4: Simplify right side
   16,805.72x = 225,662,821.41
5. Step 5: Solve for x
   x = 225,662,821.41/16,805.72
6. Step 6: Final answer
   x = 13,427.74