Finding the Fourth Proportional to 3,128.46, 4,308.08 and 2,796.76

Step by Step Solution

1. Step 1: Write the proportion equation
   3,128.46 : 4,308.08 = 2,796.76 : x
2. Step 2: Convert to fraction form
   3,128.46/4,308.08 = 2,796.76/x
3. Step 3: Cross multiply
   3,128.46x = 4,308.08 × 2,796.76
4. Step 4: Simplify right side
   3,128.46x = 12,048,665.82
5. Step 5: Solve for x
   x = 12,048,665.82/3,128.46
6. Step 6: Final answer
   x = 3,851.32