Finding the Fourth Proportional to 8,384.31, 12,578.99 and 3,384.11

Step by Step Solution

1. Step 1: Write the proportion equation
   8,384.31 : 12,578.99 = 3,384.11 : x
2. Step 2: Convert to fraction form
   8,384.31/12,578.99 = 3,384.11/x
3. Step 3: Cross multiply
   8,384.31x = 12,578.99 × 3,384.11
4. Step 4: Simplify right side
   8,384.31x = 42,568,716.10
5. Step 5: Solve for x
   x = 42,568,716.10/8,384.31
6. Step 6: Final answer
   x = 5,077.19