Finding the Fourth Proportional to 2,162.88, 3,245.26 and 1,680.12

Step by Step Solution

1. Step 1: Write the proportion equation
   2,162.88 : 3,245.26 = 1,680.12 : x
2. Step 2: Convert to fraction form
   2,162.88/3,245.26 = 1,680.12/x
3. Step 3: Cross multiply
   2,162.88x = 3,245.26 × 1,680.12
4. Step 4: Simplify right side
   2,162.88x = 5,452,426.23
5. Step 5: Solve for x
   x = 5,452,426.23/2,162.88
6. Step 6: Final answer
   x = 2,520.91