Finding the Fourth Proportional to 8,661.57, 12,993.72 and 2,816.82

Step by Step Solution

1. Step 1: Write the proportion equation
   8,661.57 : 12,993.72 = 2,816.82 : x
2. Step 2: Convert to fraction form
   8,661.57/12,993.72 = 2,816.82/x
3. Step 3: Cross multiply
   8,661.57x = 12,993.72 × 2,816.82
4. Step 4: Simplify right side
   8,661.57x = 36,600,970.37
5. Step 5: Solve for x
   x = 36,600,970.37/8,661.57
6. Step 6: Final answer
   x = 4,225.67