Finding the Fourth Proportional to 2,389.84, 3,580.50 and 2,039.61

Step by Step Solution

1. Step 1: Write the proportion equation
   2,389.84 : 3,580.50 = 2,039.61 : x
2. Step 2: Convert to fraction form
   2,389.84/3,580.50 = 2,039.61/x
3. Step 3: Cross multiply
   2,389.84x = 3,580.50 × 2,039.61
4. Step 4: Simplify right side
   2,389.84x = 7,302,823.61
5. Step 5: Solve for x
   x = 7,302,823.61/2,389.84
6. Step 6: Final answer
   x = 3,055.78