Finding the Fourth Proportional to 3,853.57, 5,786.85 and 3,656.29

Step by Step Solution

1. Step 1: Write the proportion equation
   3,853.57 : 5,786.85 = 3,656.29 : x
2. Step 2: Convert to fraction form
   3,853.57/5,786.85 = 3,656.29/x
3. Step 3: Cross multiply
   3,853.57x = 5,786.85 × 3,656.29
4. Step 4: Simplify right side
   3,853.57x = 21,158,401.79
5. Step 5: Solve for x
   x = 21,158,401.79/3,853.57
6. Step 6: Final answer
   x = 5,490.60