Finding the Fourth Proportional to 1,960.09, 2,939.72 and 919.82

Step by Step Solution

1. Step 1: Write the proportion equation
   1,960.09 : 2,939.72 = 919.82 : x
2. Step 2: Convert to fraction form
   1,960.09/2,939.72 = 919.82/x
3. Step 3: Cross multiply
   1,960.09x = 2,939.72 × 919.82
4. Step 4: Simplify right side
   1,960.09x = 2,704,016.00
5. Step 5: Solve for x
   x = 2,704,016.00/1,960.09
6. Step 6: Final answer
   x = 1,379.54