Finding the Fourth Proportional to 7,200.49, 10,800.37 and 2,818.75

Step by Step Solution

1. Step 1: Write the proportion equation
   7,200.49 : 10,800.37 = 2,818.75 : x
2. Step 2: Convert to fraction form
   7,200.49/10,800.37 = 2,818.75/x
3. Step 3: Cross multiply
   7,200.49x = 10,800.37 × 2,818.75
4. Step 4: Simplify right side
   7,200.49x = 30,443,481.89
5. Step 5: Solve for x
   x = 30,443,481.89/7,200.49
6. Step 6: Final answer
   x = 4,227.98