Finding the Fourth Proportional to 3,128.58, 4,308.26 and 2,796.89

Step by Step Solution

1. Step 1: Write the proportion equation
   3,128.58 : 4,308.26 = 2,796.89 : x
2. Step 2: Convert to fraction form
   3,128.58/4,308.26 = 2,796.89/x
3. Step 3: Cross multiply
   3,128.58x = 4,308.26 × 2,796.89
4. Step 4: Simplify right side
   3,128.58x = 12,049,693.79
5. Step 5: Solve for x
   x = 12,049,693.79/3,128.58
6. Step 6: Final answer
   x = 3,851.49