Finding the Fourth Proportional to 2,870.32, 4,305.09 and 789.83

Step by Step Solution

1. Step 1: Write the proportion equation
   2,870.32 : 4,305.09 = 789.83 : x
2. Step 2: Convert to fraction form
   2,870.32/4,305.09 = 789.83/x
3. Step 3: Cross multiply
   2,870.32x = 4,305.09 × 789.83
4. Step 4: Simplify right side
   2,870.32x = 3,400,269.15
5. Step 5: Solve for x
   x = 3,400,269.15/2,870.32
6. Step 6: Final answer
   x = 1,184.63