Finding the Fourth Proportional to 5,145.56, 7,716.72 and 1,682

Step by Step Solution

1. Step 1: Write the proportion equation
   5,145.56 : 7,716.72 = 1,682 : x
2. Step 2: Convert to fraction form
   5,145.56/7,716.72 = 1,682/x
3. Step 3: Cross multiply
   5,145.56x = 7,716.72 × 1,682
4. Step 4: Simplify right side
   5,145.56x = 12,979,523.04
5. Step 5: Solve for x
   x = 12,979,523.04/5,145.56
6. Step 6: Final answer
   x = 2,522.47