Finding the Fourth Proportional to 2,039.46, 3,057.05 and 854.18

Step by Step Solution

1. Step 1: Write the proportion equation
   2,039.46 : 3,057.05 = 854.18 : x
2. Step 2: Convert to fraction form
   2,039.46/3,057.05 = 854.18/x
3. Step 3: Cross multiply
   2,039.46x = 3,057.05 × 854.18
4. Step 4: Simplify right side
   2,039.46x = 2,611,265.46
5. Step 5: Solve for x
   x = 2,611,265.46/2,039.46
6. Step 6: Final answer
   x = 1,280.37