Finding the Fourth Proportional to 2,342.76, 3,228.57 and 1,678.47

Step by Step Solution

1. Step 1: Write the proportion equation
   2,342.76 : 3,228.57 = 1,678.47 : x
2. Step 2: Convert to fraction form
   2,342.76/3,228.57 = 1,678.47/x
3. Step 3: Cross multiply
   2,342.76x = 3,228.57 × 1,678.47
4. Step 4: Simplify right side
   2,342.76x = 5,419,057.89
5. Step 5: Solve for x
   x = 5,419,057.89/2,342.76
6. Step 6: Final answer
   x = 2,313.11