Finding the Fourth Proportional to 8,196.99, 12,290.22 and 3,520.05

Step by Step Solution

1. Step 1: Write the proportion equation
   8,196.99 : 12,290.22 = 3,520.05 : x
2. Step 2: Convert to fraction form
   8,196.99/12,290.22 = 3,520.05/x
3. Step 3: Cross multiply
   8,196.99x = 12,290.22 × 3,520.05
4. Step 4: Simplify right side
   8,196.99x = 43,262,188.91
5. Step 5: Solve for x
   x = 43,262,188.91/8,196.99
6. Step 6: Final answer
   x = 5,277.81