Finding the Fourth Proportional to 5,456.30, 8,185.73 and 2,169.72

Step by Step Solution

1. Step 1: Write the proportion equation
   5,456.30 : 8,185.73 = 2,169.72 : x
2. Step 2: Convert to fraction form
   5,456.30/8,185.73 = 2,169.72/x
3. Step 3: Cross multiply
   5,456.30x = 8,185.73 × 2,169.72
4. Step 4: Simplify right side
   5,456.30x = 17,760,731.25
5. Step 5: Solve for x
   x = 17,760,731.25/5,456.30
6. Step 6: Final answer
   x = 3,255.09