Finding the Fourth Proportional to 3,953.89, 5,456.30 and 2,185.52

Step by Step Solution

1. Step 1: Write the proportion equation
   3,953.89 : 5,456.30 = 2,185.52 : x
2. Step 2: Convert to fraction form
   3,953.89/5,456.30 = 2,185.52/x
3. Step 3: Cross multiply
   3,953.89x = 5,456.30 × 2,185.52
4. Step 4: Simplify right side
   3,953.89x = 11,924,871.88
5. Step 5: Solve for x
   x = 11,924,871.88/3,953.89
6. Step 6: Final answer
   x = 3,015.99