Finding the Fourth Proportional to 1,806.39, 2,491.61 and 1,281.51

Step by Step Solution

1. Step 1: Write the proportion equation
   1,806.39 : 2,491.61 = 1,281.51 : x
2. Step 2: Convert to fraction form
   1,806.39/2,491.61 = 1,281.51/x
3. Step 3: Cross multiply
   1,806.39x = 2,491.61 × 1,281.51
4. Step 4: Simplify right side
   1,806.39x = 3,193,016.72
5. Step 5: Solve for x
   x = 3,193,016.72/1,806.39
6. Step 6: Final answer
   x = 1,767.62