Finding the Fourth Proportional to 1,419.92, 1,959.52 and 860.48

Step by Step Solution

1. Step 1: Write the proportion equation
   1,419.92 : 1,959.52 = 860.48 : x
2. Step 2: Convert to fraction form
   1,419.92/1,959.52 = 860.48/x
3. Step 3: Cross multiply
   1,419.92x = 1,959.52 × 860.48
4. Step 4: Simplify right side
   1,419.92x = 1,686,127.77
5. Step 5: Solve for x
   x = 1,686,127.77/1,419.92
6. Step 6: Final answer
   x = 1,187.48