Finding the Fourth Proportional to 8,389.84, 12,585.18 and 3,196.12

Step by Step Solution

1. Step 1: Write the proportion equation
   8,389.84 : 12,585.18 = 3,196.12 : x
2. Step 2: Convert to fraction form
   8,389.84/12,585.18 = 3,196.12/x
3. Step 3: Cross multiply
   8,389.84x = 12,585.18 × 3,196.12
4. Step 4: Simplify right side
   8,389.84x = 40,223,745.50
5. Step 5: Solve for x
   x = 40,223,745.50/8,389.84
6. Step 6: Final answer
   x = 4,794.34