Finding the Fourth Proportional to 1,585.41, 2,182.89 and 1,439.61

Step by Step Solution

1. Step 1: Write the proportion equation
   1,585.41 : 2,182.89 = 1,439.61 : x
2. Step 2: Convert to fraction form
   1,585.41/2,182.89 = 1,439.61/x
3. Step 3: Cross multiply
   1,585.41x = 2,182.89 × 1,439.61
4. Step 4: Simplify right side
   1,585.41x = 3,142,510.27
5. Step 5: Solve for x
   x = 3,142,510.27/1,585.41
6. Step 6: Final answer
   x = 1,982.14