Finding the Fourth Proportional to 1,520.47, 2,279.52 and 789.58

Step by Step Solution

1. Step 1: Write the proportion equation
   1,520.47 : 2,279.52 = 789.58 : x
2. Step 2: Convert to fraction form
   1,520.47/2,279.52 = 789.58/x
3. Step 3: Cross multiply
   1,520.47x = 2,279.52 × 789.58
4. Step 4: Simplify right side
   1,520.47x = 1,799,863.40
5. Step 5: Solve for x
   x = 1,799,863.40/1,520.47
6. Step 6: Final answer
   x = 1,183.75