Finding the Fourth Proportional to 2,520.05, 3,475.87 and 1,680.32

Step by Step Solution

1. Step 1: Write the proportion equation
   2,520.05 : 3,475.87 = 1,680.32 : x
2. Step 2: Convert to fraction form
   2,520.05/3,475.87 = 1,680.32/x
3. Step 3: Cross multiply
   2,520.05x = 3,475.87 × 1,680.32
4. Step 4: Simplify right side
   2,520.05x = 5,840,578.37
5. Step 5: Solve for x
   x = 5,840,578.37/2,520.05
6. Step 6: Final answer
   x = 2,317.65