Finding the Fourth Proportional to 1,419.73, 1,959.27 and 860.30

Step by Step Solution

1. Step 1: Write the proportion equation
   1,419.73 : 1,959.27 = 860.30 : x
2. Step 2: Convert to fraction form
   1,419.73/1,959.27 = 860.30/x
3. Step 3: Cross multiply
   1,419.73x = 1,959.27 × 860.30
4. Step 4: Simplify right side
   1,419.73x = 1,685,559.98
5. Step 5: Solve for x
   x = 1,685,559.98/1,419.73
6. Step 6: Final answer
   x = 1,187.24