Finding the Fourth Proportional to 2,178.18, 3,003.87 and 1,680.03

Step by Step Solution

1. Step 1: Write the proportion equation
   2,178.18 : 3,003.87 = 1,680.03 : x
2. Step 2: Convert to fraction form
   2,178.18/3,003.87 = 1,680.03/x
3. Step 3: Cross multiply
   2,178.18x = 3,003.87 × 1,680.03
4. Step 4: Simplify right side
   2,178.18x = 5,046,591.72
5. Step 5: Solve for x
   x = 5,046,591.72/2,178.18
6. Step 6: Final answer
   x = 2,316.88