Finding the Fourth Proportional to 3,106.18, 4,288.71 and 2,553.22

Step by Step Solution

1. Step 1: Write the proportion equation
   3,106.18 : 4,288.71 = 2,553.22 : x
2. Step 2: Convert to fraction form
   3,106.18/4,288.71 = 2,553.22/x
3. Step 3: Cross multiply
   3,106.18x = 4,288.71 × 2,553.22
4. Step 4: Simplify right side
   3,106.18x = 10,950,020.15
5. Step 5: Solve for x
   x = 10,950,020.15/3,106.18
6. Step 6: Final answer
   x = 3,525.24