Finding the Fourth Proportional to 3,255.89, 4,885.59 and 2,160.77

Step by Step Solution

1. Step 1: Write the proportion equation
   3,255.89 : 4,885.59 = 2,160.77 : x
2. Step 2: Convert to fraction form
   3,255.89/4,885.59 = 2,160.77/x
3. Step 3: Cross multiply
   3,255.89x = 4,885.59 × 2,160.77
4. Step 4: Simplify right side
   3,255.89x = 10,556,636.30
5. Step 5: Solve for x
   x = 10,556,636.30/3,255.89
6. Step 6: Final answer
   x = 3,242.32