Finding the Fourth Proportional to 1,827.91, 2,520.88 and 1,639.45

Step by Step Solution

1. Step 1: Write the proportion equation
   1,827.91 : 2,520.88 = 1,639.45 : x
2. Step 2: Convert to fraction form
   1,827.91/2,520.88 = 1,639.45/x
3. Step 3: Cross multiply
   1,827.91x = 2,520.88 × 1,639.45
4. Step 4: Simplify right side
   1,827.91x = 4,132,856.72
5. Step 5: Solve for x
   x = 4,132,856.72/1,827.91
6. Step 6: Final answer
   x = 2,260.97