Finding the Fourth Proportional to 3,869.10, 5,340.54 and 2,379.18

Step by Step Solution

1. Step 1: Write the proportion equation
   3,869.10 : 5,340.54 = 2,379.18 : x
2. Step 2: Convert to fraction form
   3,869.10/5,340.54 = 2,379.18/x
3. Step 3: Cross multiply
   3,869.10x = 5,340.54 × 2,379.18
4. Step 4: Simplify right side
   3,869.10x = 12,706,105.96
5. Step 5: Solve for x
   x = 12,706,105.96/3,869.10
6. Step 6: Final answer
   x = 3,284.00