Finding the Fourth Proportional to 7,018.27, 10,527.37 and 2,857.30

Step by Step Solution

1. Step 1: Write the proportion equation
   7,018.27 : 10,527.37 = 2,857.30 : x
2. Step 2: Convert to fraction form
   7,018.27/10,527.37 = 2,857.30/x
3. Step 3: Cross multiply
   7,018.27x = 10,527.37 × 2,857.30
4. Step 4: Simplify right side
   7,018.27x = 30,079,820.84
5. Step 5: Solve for x
   x = 30,079,820.84/7,018.27
6. Step 6: Final answer
   x = 4,285.93