Finding the Fourth Proportional to 7,018.72, 10,518.99 and 2,853.86

Step by Step Solution

1. Step 1: Write the proportion equation
   7,018.72 : 10,518.99 = 2,853.86 : x
2. Step 2: Convert to fraction form
   7,018.72/10,518.99 = 2,853.86/x
3. Step 3: Cross multiply
   7,018.72x = 10,518.99 × 2,853.86
4. Step 4: Simplify right side
   7,018.72x = 30,019,661.50
5. Step 5: Solve for x
   x = 30,019,661.50/7,018.72
6. Step 6: Final answer
   x = 4,277.09