Finding the Fourth Proportional to 8,155.40, 12,234.63 and 2,818.31

Step by Step Solution

1. Step 1: Write the proportion equation
   8,155.40 : 12,234.63 = 2,818.31 : x
2. Step 2: Convert to fraction form
   8,155.40/12,234.63 = 2,818.31/x
3. Step 3: Cross multiply
   8,155.40x = 12,234.63 × 2,818.31
4. Step 4: Simplify right side
   8,155.40x = 34,480,980.08
5. Step 5: Solve for x
   x = 34,480,980.08/8,155.40
6. Step 6: Final answer
   x = 4,227.99