Finding the Fourth Proportional to 1,419.36, 1,958.89 and 859.82

Step by Step Solution

1. Step 1: Write the proportion equation
   1,419.36 : 1,958.89 = 859.82 : x
2. Step 2: Convert to fraction form
   1,419.36/1,958.89 = 859.82/x
3. Step 3: Cross multiply
   1,419.36x = 1,958.89 × 859.82
4. Step 4: Simplify right side
   1,419.36x = 1,684,278.71
5. Step 5: Solve for x
   x = 1,684,278.71/1,419.36
6. Step 6: Final answer
   x = 1,186.65