Finding the Fourth Proportional to 3,853.91, 5,318.37 and 2,085.53

Step by Step Solution

1. Step 1: Write the proportion equation
   3,853.91 : 5,318.37 = 2,085.53 : x
2. Step 2: Convert to fraction form
   3,853.91/5,318.37 = 2,085.53/x
3. Step 3: Cross multiply
   3,853.91x = 5,318.37 × 2,085.53
4. Step 4: Simplify right side
   3,853.91x = 11,091,593.59
5. Step 5: Solve for x
   x = 11,091,593.59/3,853.91
6. Step 6: Final answer
   x = 2,878.01