Finding the Fourth Proportional to 3,410.88, 5,112.48 and 1,680.72

Step by Step Solution

1. Step 1: Write the proportion equation
   3,410.88 : 5,112.48 = 1,680.72 : x
2. Step 2: Convert to fraction form
   3,410.88/5,112.48 = 1,680.72/x
3. Step 3: Cross multiply
   3,410.88x = 5,112.48 × 1,680.72
4. Step 4: Simplify right side
   3,410.88x = 8,592,647.39
5. Step 5: Solve for x
   x = 8,592,647.39/3,410.88
6. Step 6: Final answer
   x = 2,519.19