Finding the Fourth Proportional to 1,825.81, 2,520.82 and 1,405.42

Step by Step Solution

1. Step 1: Write the proportion equation
   1,825.81 : 2,520.82 = 1,405.42 : x
2. Step 2: Convert to fraction form
   1,825.81/2,520.82 = 1,405.42/x
3. Step 3: Cross multiply
   1,825.81x = 2,520.82 × 1,405.42
4. Step 4: Simplify right side
   1,825.81x = 3,542,806.30
5. Step 5: Solve for x
   x = 3,542,806.30/1,825.81
6. Step 6: Final answer
   x = 1,940.41