Finding the Fourth Proportional to 2,178.93, 3,008.03 and 1,680.47

Step by Step Solution

1. Step 1: Write the proportion equation
   2,178.93 : 3,008.03 = 1,680.47 : x
2. Step 2: Convert to fraction form
   2,178.93/3,008.03 = 1,680.47/x
3. Step 3: Cross multiply
   2,178.93x = 3,008.03 × 1,680.47
4. Step 4: Simplify right side
   2,178.93x = 5,054,880.73
5. Step 5: Solve for x
   x = 5,054,880.73/2,178.93
6. Step 6: Final answer
   x = 2,319.89