Finding the Fourth Proportional to 1,520.82, 2,279.40 and 789.98

Step by Step Solution

1. Step 1: Write the proportion equation
   1,520.82 : 2,279.40 = 789.98 : x
2. Step 2: Convert to fraction form
   1,520.82/2,279.40 = 789.98/x
3. Step 3: Cross multiply
   1,520.82x = 2,279.40 × 789.98
4. Step 4: Simplify right side
   1,520.82x = 1,800,680.41
5. Step 5: Solve for x
   x = 1,800,680.41/1,520.82
6. Step 6: Final answer
   x = 1,184.02