Finding the Fourth Proportional to 5,149.71, 7,728.35 and 3,982.59

Step by Step Solution

1. Step 1: Write the proportion equation
   5,149.71 : 7,728.35 = 3,982.59 : x
2. Step 2: Convert to fraction form
   5,149.71/7,728.35 = 3,982.59/x
3. Step 3: Cross multiply
   5,149.71x = 7,728.35 × 3,982.59
4. Step 4: Simplify right side
   5,149.71x = 30,778,829.51
5. Step 5: Solve for x
   x = 30,778,829.51/5,149.71
6. Step 6: Final answer
   x = 5,976.81