Finding the Fourth Proportional to 1,380.45, 1,903.98 and 960.82

Step by Step Solution

1. Step 1: Write the proportion equation
   1,380.45 : 1,903.98 = 960.82 : x
2. Step 2: Convert to fraction form
   1,380.45/1,903.98 = 960.82/x
3. Step 3: Cross multiply
   1,380.45x = 1,903.98 × 960.82
4. Step 4: Simplify right side
   1,380.45x = 1,829,382.06
5. Step 5: Solve for x
   x = 1,829,382.06/1,380.45
6. Step 6: Final answer
   x = 1,325.21