Finding the Fourth Proportional to 2,485.09, 3,429.33 and 1,489.78

Step by Step Solution

1. Step 1: Write the proportion equation
   2,485.09 : 3,429.33 = 1,489.78 : x
2. Step 2: Convert to fraction form
   2,485.09/3,429.33 = 1,489.78/x
3. Step 3: Cross multiply
   2,485.09x = 3,429.33 × 1,489.78
4. Step 4: Simplify right side
   2,485.09x = 5,108,930.10
5. Step 5: Solve for x
   x = 5,108,930.10/2,485.09
6. Step 6: Final answer
   x = 2,055.84