Finding the Fourth Proportional to 2,389.96, 3,582.78 and 1,234.60

Step by Step Solution

1. Step 1: Write the proportion equation
   2,389.96 : 3,582.78 = 1,234.60 : x
2. Step 2: Convert to fraction form
   2,389.96/3,582.78 = 1,234.60/x
3. Step 3: Cross multiply
   2,389.96x = 3,582.78 × 1,234.60
4. Step 4: Simplify right side
   2,389.96x = 4,423,300.19
5. Step 5: Solve for x
   x = 4,423,300.19/2,389.96
6. Step 6: Final answer
   x = 1,850.78