Finding the Fourth Proportional to 3,320.72, 4,984.16 and 1,678.42

Step by Step Solution

1. Step 1: Write the proportion equation
   3,320.72 : 4,984.16 = 1,678.42 : x
2. Step 2: Convert to fraction form
   3,320.72/4,984.16 = 1,678.42/x
3. Step 3: Cross multiply
   3,320.72x = 4,984.16 × 1,678.42
4. Step 4: Simplify right side
   3,320.72x = 8,365,513.83
5. Step 5: Solve for x
   x = 8,365,513.83/3,320.72
6. Step 6: Final answer
   x = 2,519.19