Finding the Fourth Proportional to 2,389.89, 3,585.38 and 829.92

Step by Step Solution

1. Step 1: Write the proportion equation
   2,389.89 : 3,585.38 = 829.92 : x
2. Step 2: Convert to fraction form
   2,389.89/3,585.38 = 829.92/x
3. Step 3: Cross multiply
   2,389.89x = 3,585.38 × 829.92
4. Step 4: Simplify right side
   2,389.89x = 2,975,574.42
5. Step 5: Solve for x
   x = 2,975,574.42/2,389.89
6. Step 6: Final answer
   x = 1,245.07