Finding the Fourth Proportional to 8,418.42, 12,620.72 and 3,491.60

Step by Step Solution

1. Step 1: Write the proportion equation
   8,418.42 : 12,620.72 = 3,491.60 : x
2. Step 2: Convert to fraction form
   8,418.42/12,620.72 = 3,491.60/x
3. Step 3: Cross multiply
   8,418.42x = 12,620.72 × 3,491.60
4. Step 4: Simplify right side
   8,418.42x = 44,066,451.58
5. Step 5: Solve for x
   x = 44,066,451.58/8,418.42
6. Step 6: Final answer
   x = 5,234.53