Finding the Fourth Proportional to 2,955.56, 4,078.96 and 2,689.47

Step by Step Solution

1. Step 1: Write the proportion equation
   2,955.56 : 4,078.96 = 2,689.47 : x
2. Step 2: Convert to fraction form
   2,955.56/4,078.96 = 2,689.47/x
3. Step 3: Cross multiply
   2,955.56x = 4,078.96 × 2,689.47
4. Step 4: Simplify right side
   2,955.56x = 10,970,233.83
5. Step 5: Solve for x
   x = 10,970,233.83/2,955.56
6. Step 6: Final answer
   x = 3,711.73