Finding the Fourth Proportional to 8,389.29, 12,583.83 and 3,391.59

Step by Step Solution

1. Step 1: Write the proportion equation
   8,389.29 : 12,583.83 = 3,391.59 : x
2. Step 2: Convert to fraction form
   8,389.29/12,583.83 = 3,391.59/x
3. Step 3: Cross multiply
   8,389.29x = 12,583.83 × 3,391.59
4. Step 4: Simplify right side
   8,389.29x = 42,679,191.99
5. Step 5: Solve for x
   x = 42,679,191.99/8,389.29
6. Step 6: Final answer
   x = 5,087.34