Finding the Fourth Proportional to 8,081.12, 12,118.67 and 2,814.78

Step by Step Solution

1. Step 1: Write the proportion equation
   8,081.12 : 12,118.67 = 2,814.78 : x
2. Step 2: Convert to fraction form
   8,081.12/12,118.67 = 2,814.78/x
3. Step 3: Cross multiply
   8,081.12x = 12,118.67 × 2,814.78
4. Step 4: Simplify right side
   8,081.12x = 34,111,329.35
5. Step 5: Solve for x
   x = 34,111,329.35/8,081.12
6. Step 6: Final answer
   x = 4,221.12