Finding the Fourth Proportional to 8,404.89, 12,609.15 and 2,561.34

Step by Step Solution

1. Step 1: Write the proportion equation
   8,404.89 : 12,609.15 = 2,561.34 : x
2. Step 2: Convert to fraction form
   8,404.89/12,609.15 = 2,561.34/x
3. Step 3: Cross multiply
   8,404.89x = 12,609.15 × 2,561.34
4. Step 4: Simplify right side
   8,404.89x = 32,296,320.26
5. Step 5: Solve for x
   x = 32,296,320.26/8,404.89
6. Step 6: Final answer
   x = 3,842.56