Finding the Fourth Proportional to 1,379.73, 1,903.65 and 959.61

Step by Step Solution

1. Step 1: Write the proportion equation
   1,379.73 : 1,903.65 = 959.61 : x
2. Step 2: Convert to fraction form
   1,379.73/1,903.65 = 959.61/x
3. Step 3: Cross multiply
   1,379.73x = 1,903.65 × 959.61
4. Step 4: Simplify right side
   1,379.73x = 1,826,761.58
5. Step 5: Solve for x
   x = 1,826,761.58/1,379.73
6. Step 6: Final answer
   x = 1,324.00