Finding the Fourth Proportional to 8,011.72, 12,015.42 and 2,814.76

Step by Step Solution

1. Step 1: Write the proportion equation
   8,011.72 : 12,015.42 = 2,814.76 : x
2. Step 2: Convert to fraction form
   8,011.72/12,015.42 = 2,814.76/x
3. Step 3: Cross multiply
   8,011.72x = 12,015.42 × 2,814.76
4. Step 4: Simplify right side
   8,011.72x = 33,820,523.60
5. Step 5: Solve for x
   x = 33,820,523.60/8,011.72
6. Step 6: Final answer
   x = 4,221.38