Finding the Fourth Proportional to 1,418.84, 1,958.05 and 859.22

Step by Step Solution

1. Step 1: Write the proportion equation
   1,418.84 : 1,958.05 = 859.22 : x
2. Step 2: Convert to fraction form
   1,418.84/1,958.05 = 859.22/x
3. Step 3: Cross multiply
   1,418.84x = 1,958.05 × 859.22
4. Step 4: Simplify right side
   1,418.84x = 1,682,395.72
5. Step 5: Solve for x
   x = 1,682,395.72/1,418.84
6. Step 6: Final answer
   x = 1,185.75