Finding the Fourth Proportional to 3,866.86, 5,802.18 and 2,405.62

Step by Step Solution

1. Step 1: Write the proportion equation
   3,866.86 : 5,802.18 = 2,405.62 : x
2. Step 2: Convert to fraction form
   3,866.86/5,802.18 = 2,405.62/x
3. Step 3: Cross multiply
   3,866.86x = 5,802.18 × 2,405.62
4. Step 4: Simplify right side
   3,866.86x = 13,957,840.25
5. Step 5: Solve for x
   x = 13,957,840.25/3,866.86
6. Step 6: Final answer
   x = 3,609.61