Finding the Fourth Proportional to 1,449.39, 1,999.37 and 859.51

Step by Step Solution

1. Step 1: Write the proportion equation
   1,449.39 : 1,999.37 = 859.51 : x
2. Step 2: Convert to fraction form
   1,449.39/1,999.37 = 859.51/x
3. Step 3: Cross multiply
   1,449.39x = 1,999.37 × 859.51
4. Step 4: Simplify right side
   1,449.39x = 1,718,464.21
5. Step 5: Solve for x
   x = 1,718,464.21/1,449.39
6. Step 6: Final answer
   x = 1,185.65