Finding the Fourth Proportional to 2,178.30, 3,006.06 and 1,680

Step by Step Solution

1. Step 1: Write the proportion equation
   2,178.30 : 3,006.06 = 1,680 : x
2. Step 2: Convert to fraction form
   2,178.30/3,006.06 = 1,680/x
3. Step 3: Cross multiply
   2,178.30x = 3,006.06 × 1,680
4. Step 4: Simplify right side
   2,178.30x = 5,050,180.80
5. Step 5: Solve for x
   x = 5,050,180.80/2,178.30
6. Step 6: Final answer
   x = 2,318.40