Finding the Fourth Proportional to 2,523.77, 3,479.78 and 1,639.25

Step by Step Solution

1. Step 1: Write the proportion equation
   2,523.77 : 3,479.78 = 1,639.25 : x
2. Step 2: Convert to fraction form
   2,523.77/3,479.78 = 1,639.25/x
3. Step 3: Cross multiply
   2,523.77x = 3,479.78 × 1,639.25
4. Step 4: Simplify right side
   2,523.77x = 5,704,229.37
5. Step 5: Solve for x
   x = 5,704,229.37/2,523.77
6. Step 6: Final answer
   x = 2,260.20