Finding the Fourth Proportional to 3,953.91, 5,456.50 and 2,185.63

Step by Step Solution

1. Step 1: Write the proportion equation
   3,953.91 : 5,456.50 = 2,185.63 : x
2. Step 2: Convert to fraction form
   3,953.91/5,456.50 = 2,185.63/x
3. Step 3: Cross multiply
   3,953.91x = 5,456.50 × 2,185.63
4. Step 4: Simplify right side
   3,953.91x = 11,925,890.10
5. Step 5: Solve for x
   x = 11,925,890.10/3,953.91
6. Step 6: Final answer
   x = 3,016.23