Finding the Fourth Proportional to 2,820.72, 3,888.09 and 2,222.27

Step by Step Solution

1. Step 1: Write the proportion equation
   2,820.72 : 3,888.09 = 2,222.27 : x
2. Step 2: Convert to fraction form
   2,820.72/3,888.09 = 2,222.27/x
3. Step 3: Cross multiply
   2,820.72x = 3,888.09 × 2,222.27
4. Step 4: Simplify right side
   2,820.72x = 8,640,366.32
5. Step 5: Solve for x
   x = 8,640,366.32/2,820.72
6. Step 6: Final answer
   x = 3,063.18