Finding the Fourth Proportional to 2,757.30, 4,128.78 and 2,167.16

Step by Step Solution

1. Step 1: Write the proportion equation
   2,757.30 : 4,128.78 = 2,167.16 : x
2. Step 2: Convert to fraction form
   2,757.30/4,128.78 = 2,167.16/x
3. Step 3: Cross multiply
   2,757.30x = 4,128.78 × 2,167.16
4. Step 4: Simplify right side
   2,757.30x = 8,947,726.86
5. Step 5: Solve for x
   x = 8,947,726.86/2,757.30
6. Step 6: Final answer
   x = 3,245.10