Finding the Fourth Proportional to 6,825.39, 10,233.89 and 3,128.76

Step by Step Solution

1. Step 1: Write the proportion equation
   6,825.39 : 10,233.89 = 3,128.76 : x
2. Step 2: Convert to fraction form
   6,825.39/10,233.89 = 3,128.76/x
3. Step 3: Cross multiply
   6,825.39x = 10,233.89 × 3,128.76
4. Step 4: Simplify right side
   6,825.39x = 32,019,318.86
5. Step 5: Solve for x
   x = 32,019,318.86/6,825.39
6. Step 6: Final answer
   x = 4,691.21