Finding the Fourth Proportional to 3,865.83, 5,333.94 and 2,609.21

Step by Step Solution

1. Step 1: Write the proportion equation
   3,865.83 : 5,333.94 = 2,609.21 : x
2. Step 2: Convert to fraction form
   3,865.83/5,333.94 = 2,609.21/x
3. Step 3: Cross multiply
   3,865.83x = 5,333.94 × 2,609.21
4. Step 4: Simplify right side
   3,865.83x = 13,917,369.59
5. Step 5: Solve for x
   x = 13,917,369.59/3,865.83
6. Step 6: Final answer
   x = 3,600.10