Finding the Fourth Proportional to 1,419.93, 1,959.59 and 860.42

Step by Step Solution

1. Step 1: Write the proportion equation
   1,419.93 : 1,959.59 = 860.42 : x
2. Step 2: Convert to fraction form
   1,419.93/1,959.59 = 860.42/x
3. Step 3: Cross multiply
   1,419.93x = 1,959.59 × 860.42
4. Step 4: Simplify right side
   1,419.93x = 1,686,062.78
5. Step 5: Solve for x
   x = 1,686,062.78/1,419.93
6. Step 6: Final answer
   x = 1,187.43