Finding the Fourth Proportional to 3,853.89, 5,318.37 and 2,085.49

Step by Step Solution

1. Step 1: Write the proportion equation
   3,853.89 : 5,318.37 = 2,085.49 : x
2. Step 2: Convert to fraction form
   3,853.89/5,318.37 = 2,085.49/x
3. Step 3: Cross multiply
   3,853.89x = 5,318.37 × 2,085.49
4. Step 4: Simplify right side
   3,853.89x = 11,091,407.45
5. Step 5: Solve for x
   x = 11,091,407.45/3,853.89
6. Step 6: Final answer
   x = 2,877.98