Finding the Fourth Proportional to 2,866.51, 3,954.39 and 1,805.59

Step by Step Solution

1. Step 1: Write the proportion equation
   2,866.51 : 3,954.39 = 1,805.59 : x
2. Step 2: Convert to fraction form
   2,866.51/3,954.39 = 1,805.59/x
3. Step 3: Cross multiply
   2,866.51x = 3,954.39 × 1,805.59
4. Step 4: Simplify right side
   2,866.51x = 7,140,007.04
5. Step 5: Solve for x
   x = 7,140,007.04/2,866.51
6. Step 6: Final answer
   x = 2,490.84