Finding the Fourth Proportional to 8,435.29, 12,649.83 and 2,811.91

Step by Step Solution

1. Step 1: Write the proportion equation
   8,435.29 : 12,649.83 = 2,811.91 : x
2. Step 2: Convert to fraction form
   8,435.29/12,649.83 = 2,811.91/x
3. Step 3: Cross multiply
   8,435.29x = 12,649.83 × 2,811.91
4. Step 4: Simplify right side
   8,435.29x = 35,570,183.48
5. Step 5: Solve for x
   x = 35,570,183.48/8,435.29
6. Step 6: Final answer
   x = 4,216.83