Finding the Fourth Proportional to 8,112.52, 12,168.84 and 2,847.28

Step by Step Solution

1. Step 1: Write the proportion equation
   8,112.52 : 12,168.84 = 2,847.28 : x
2. Step 2: Convert to fraction form
   8,112.52/12,168.84 = 2,847.28/x
3. Step 3: Cross multiply
   8,112.52x = 12,168.84 × 2,847.28
4. Step 4: Simplify right side
   8,112.52x = 34,648,094.76
5. Step 5: Solve for x
   x = 34,648,094.76/8,112.52
6. Step 6: Final answer
   x = 4,270.94