Finding the Fourth Proportional to 2,139.57, 2,960.71 and 1,824.35

Step by Step Solution

1. Step 1: Write the proportion equation
   2,139.57 : 2,960.71 = 1,824.35 : x
2. Step 2: Convert to fraction form
   2,139.57/2,960.71 = 1,824.35/x
3. Step 3: Cross multiply
   2,139.57x = 2,960.71 × 1,824.35
4. Step 4: Simplify right side
   2,139.57x = 5,401,351.92
5. Step 5: Solve for x
   x = 5,401,351.92/2,139.57
6. Step 6: Final answer
   x = 2,524.50