Finding the Fourth Proportional to 1,665.81, 2,494.09 and 1,081.49

Step by Step Solution

1. Step 1: Write the proportion equation
   1,665.81 : 2,494.09 = 1,081.49 : x
2. Step 2: Convert to fraction form
   1,665.81/2,494.09 = 1,081.49/x
3. Step 3: Cross multiply
   1,665.81x = 2,494.09 × 1,081.49
4. Step 4: Simplify right side
   1,665.81x = 2,697,333.39
5. Step 5: Solve for x
   x = 2,697,333.39/1,665.81
6. Step 6: Final answer
   x = 1,619.23