Finding the Fourth Proportional to 1,448.56, 1,998.71 and 859.28

Step by Step Solution

1. Step 1: Write the proportion equation
   1,448.56 : 1,998.71 = 859.28 : x
2. Step 2: Convert to fraction form
   1,448.56/1,998.71 = 859.28/x
3. Step 3: Cross multiply
   1,448.56x = 1,998.71 × 859.28
4. Step 4: Simplify right side
   1,448.56x = 1,717,451.53
5. Step 5: Solve for x
   x = 1,717,451.53/1,448.56
6. Step 6: Final answer
   x = 1,185.63