Finding the Fourth Proportional to 8,389.41, 12,585.62 and 3,456.30

Step by Step Solution

1. Step 1: Write the proportion equation
   8,389.41 : 12,585.62 = 3,456.30 : x
2. Step 2: Convert to fraction form
   8,389.41/12,585.62 = 3,456.30/x
3. Step 3: Cross multiply
   8,389.41x = 12,585.62 × 3,456.30
4. Step 4: Simplify right side
   8,389.41x = 43,499,678.41
5. Step 5: Solve for x
   x = 43,499,678.41/8,389.41
6. Step 6: Final answer
   x = 5,185.07