Finding the Fourth Proportional to 5,640.55, 8,465.69 and 3,910.39

Step by Step Solution

1. Step 1: Write the proportion equation
   5,640.55 : 8,465.69 = 3,910.39 : x
2. Step 2: Convert to fraction form
   5,640.55/8,465.69 = 3,910.39/x
3. Step 3: Cross multiply
   5,640.55x = 8,465.69 × 3,910.39
4. Step 4: Simplify right side
   5,640.55x = 33,104,147.88
5. Step 5: Solve for x
   x = 33,104,147.88/5,640.55
6. Step 6: Final answer
   x = 5,868.96