Finding the Fourth Proportional to 12,379.94, 18,567.92 and 3,612.80

Step by Step Solution

1. Step 1: Write the proportion equation
   12,379.94 : 18,567.92 = 3,612.80 : x
2. Step 2: Convert to fraction form
   12,379.94/18,567.92 = 3,612.80/x
3. Step 3: Cross multiply
   12,379.94x = 18,567.92 × 3,612.80
4. Step 4: Simplify right side
   12,379.94x = 67,082,181.38
5. Step 5: Solve for x
   x = 67,082,181.38/12,379.94
6. Step 6: Final answer
   x = 5,418.62