Finding the Fourth Proportional to 1,665.82, 2,494.09 and 1,081.50

Step by Step Solution

1. Step 1: Write the proportion equation
   1,665.82 : 2,494.09 = 1,081.50 : x
2. Step 2: Convert to fraction form
   1,665.82/2,494.09 = 1,081.50/x
3. Step 3: Cross multiply
   1,665.82x = 2,494.09 × 1,081.50
4. Step 4: Simplify right side
   1,665.82x = 2,697,358.34
5. Step 5: Solve for x
   x = 2,697,358.34/1,665.82
6. Step 6: Final answer
   x = 1,619.24