Finding the Fourth Proportional to 8,005.69, 12,010.36 and 2,811.56

Step by Step Solution

1. Step 1: Write the proportion equation
   8,005.69 : 12,010.36 = 2,811.56 : x
2. Step 2: Convert to fraction form
   8,005.69/12,010.36 = 2,811.56/x
3. Step 3: Cross multiply
   8,005.69x = 12,010.36 × 2,811.56
4. Step 4: Simplify right side
   8,005.69x = 33,767,870.76
5. Step 5: Solve for x
   x = 33,767,870.76/8,005.69
6. Step 6: Final answer
   x = 4,217.99