Finding the Fourth Proportional to 5,148.52, 7,723.98 and 1,685.56

Step by Step Solution

1. Step 1: Write the proportion equation
   5,148.52 : 7,723.98 = 1,685.56 : x
2. Step 2: Convert to fraction form
   5,148.52/7,723.98 = 1,685.56/x
3. Step 3: Cross multiply
   5,148.52x = 7,723.98 × 1,685.56
4. Step 4: Simplify right side
   5,148.52x = 13,019,231.73
5. Step 5: Solve for x
   x = 13,019,231.73/5,148.52
6. Step 6: Final answer
   x = 2,528.73