Finding the Fourth Proportional to 8,142.37, 12,205.35 and 3,210.10

Step by Step Solution

1. Step 1: Write the proportion equation
   8,142.37 : 12,205.35 = 3,210.10 : x
2. Step 2: Convert to fraction form
   8,142.37/12,205.35 = 3,210.10/x
3. Step 3: Cross multiply
   8,142.37x = 12,205.35 × 3,210.10
4. Step 4: Simplify right side
   8,142.37x = 39,180,394.04
5. Step 5: Solve for x
   x = 39,180,394.04/8,142.37
6. Step 6: Final answer
   x = 4,811.92