Finding the Fourth Proportional to 1,418.74, 1,957.97 and 859.23

Step by Step Solution

1. Step 1: Write the proportion equation
   1,418.74 : 1,957.97 = 859.23 : x
2. Step 2: Convert to fraction form
   1,418.74/1,957.97 = 859.23/x
3. Step 3: Cross multiply
   1,418.74x = 1,957.97 × 859.23
4. Step 4: Simplify right side
   1,418.74x = 1,682,346.56
5. Step 5: Solve for x
   x = 1,682,346.56/1,418.74
6. Step 6: Final answer
   x = 1,185.80