Finding the Fourth Proportional to 1,959.96, 2,939.72 and 789.76

Step by Step Solution

1. Step 1: Write the proportion equation
   1,959.96 : 2,939.72 = 789.76 : x
2. Step 2: Convert to fraction form
   1,959.96/2,939.72 = 789.76/x
3. Step 3: Cross multiply
   1,959.96x = 2,939.72 × 789.76
4. Step 4: Simplify right side
   1,959.96x = 2,321,673.27
5. Step 5: Solve for x
   x = 2,321,673.27/1,959.96
6. Step 6: Final answer
   x = 1,184.55