Finding the Fourth Proportional to 2,431.42, 3,646.72 and 789.15

Step by Step Solution

1. Step 1: Write the proportion equation
   2,431.42 : 3,646.72 = 789.15 : x
2. Step 2: Convert to fraction form
   2,431.42/3,646.72 = 789.15/x
3. Step 3: Cross multiply
   2,431.42x = 3,646.72 × 789.15
4. Step 4: Simplify right side
   2,431.42x = 2,877,809.09
5. Step 5: Solve for x
   x = 2,877,809.09/2,431.42
6. Step 6: Final answer
   x = 1,183.59