Finding the Fourth Proportional to 12,461.69, 18,689.34 and 3,694.55

Step by Step Solution

1. Step 1: Write the proportion equation
   12,461.69 : 18,689.34 = 3,694.55 : x
2. Step 2: Convert to fraction form
   12,461.69/18,689.34 = 3,694.55/x
3. Step 3: Cross multiply
   12,461.69x = 18,689.34 × 3,694.55
4. Step 4: Simplify right side
   12,461.69x = 69,048,607.65
5. Step 5: Solve for x
   x = 69,048,607.65/12,461.69
6. Step 6: Final answer
   x = 5,540.87