Finding the Fourth Proportional to 2,056.28, 3,084.46 and 669.61

Step by Step Solution

1. Step 1: Write the proportion equation
   2,056.28 : 3,084.46 = 669.61 : x
2. Step 2: Convert to fraction form
   2,056.28/3,084.46 = 669.61/x
3. Step 3: Cross multiply
   2,056.28x = 3,084.46 × 669.61
4. Step 4: Simplify right side
   2,056.28x = 2,065,383.59
5. Step 5: Solve for x
   x = 2,065,383.59/2,056.28
6. Step 6: Final answer
   x = 1,004.43