Finding the Fourth Proportional to 2,580.18, 3,869.46 and 936.42

Step by Step Solution

1. Step 1: Write the proportion equation
   2,580.18 : 3,869.46 = 936.42 : x
2. Step 2: Convert to fraction form
   2,580.18/3,869.46 = 936.42/x
3. Step 3: Cross multiply
   2,580.18x = 3,869.46 × 936.42
4. Step 4: Simplify right side
   2,580.18x = 3,623,439.73
5. Step 5: Solve for x
   x = 3,623,439.73/2,580.18
6. Step 6: Final answer
   x = 1,404.34