Finding the Fourth Proportional to 2,168.72, 3,254.52 and 1,680.08

Step by Step Solution

1. Step 1: Write the proportion equation
   2,168.72 : 3,254.52 = 1,680.08 : x
2. Step 2: Convert to fraction form
   2,168.72/3,254.52 = 1,680.08/x
3. Step 3: Cross multiply
   2,168.72x = 3,254.52 × 1,680.08
4. Step 4: Simplify right side
   2,168.72x = 5,467,853.96
5. Step 5: Solve for x
   x = 5,467,853.96/2,168.72
6. Step 6: Final answer
   x = 2,521.24