Finding the Fourth Proportional to 2,178.69, 3,004.55 and 1,680.54

Step by Step Solution

1. Step 1: Write the proportion equation
   2,178.69 : 3,004.55 = 1,680.54 : x
2. Step 2: Convert to fraction form
   2,178.69/3,004.55 = 1,680.54/x
3. Step 3: Cross multiply
   2,178.69x = 3,004.55 × 1,680.54
4. Step 4: Simplify right side
   2,178.69x = 5,049,266.46
5. Step 5: Solve for x
   x = 5,049,266.46/2,178.69
6. Step 6: Final answer
   x = 2,317.57