Finding the Fourth Proportional to 8,404.74, 12,608.94 and 2,561.20

Step by Step Solution

1. Step 1: Write the proportion equation
   8,404.74 : 12,608.94 = 2,561.20 : x
2. Step 2: Convert to fraction form
   8,404.74/12,608.94 = 2,561.20/x
3. Step 3: Cross multiply
   8,404.74x = 12,608.94 × 2,561.20
4. Step 4: Simplify right side
   8,404.74x = 32,293,985.61
5. Step 5: Solve for x
   x = 32,293,985.61/8,404.74
6. Step 6: Final answer
   x = 3,842.35