Finding the Fourth Proportional to 1,960.81, 2,939.16 and 727.42

Step by Step Solution

1. Step 1: Write the proportion equation
   1,960.81 : 2,939.16 = 727.42 : x
2. Step 2: Convert to fraction form
   1,960.81/2,939.16 = 727.42/x
3. Step 3: Cross multiply
   1,960.81x = 2,939.16 × 727.42
4. Step 4: Simplify right side
   1,960.81x = 2,138,003.77
5. Step 5: Solve for x
   x = 2,138,003.77/1,960.81
6. Step 6: Final answer
   x = 1,090.37