Finding the Fourth Proportional to 1,378.73, 1,902.27 and 958.61

Step by Step Solution

1. Step 1: Write the proportion equation
   1,378.73 : 1,902.27 = 958.61 : x
2. Step 2: Convert to fraction form
   1,378.73/1,902.27 = 958.61/x
3. Step 3: Cross multiply
   1,378.73x = 1,902.27 × 958.61
4. Step 4: Simplify right side
   1,378.73x = 1,823,535.04
5. Step 5: Solve for x
   x = 1,823,535.04/1,378.73
6. Step 6: Final answer
   x = 1,322.62