Finding the Third Proportional to 3,831 and 5,485.50

Step by Step Solution

1. Step 1: Write the proportion equation
   3,831 : 5,485.50 = 5,485.50 : x
2. Step 2: Convert to fraction form
   3,831/5,485.50 = 5,485.50/x
3. Step 3: Cross multiply
   3,831x = 5,485.50 × 5,485.50
4. Step 4: Simplify right side
   3,831x = 30,090,710.25
5. Step 5: Solve for x
   x = 30,090,710.25/3,831
6. Step 6: Final answer
   x = 7,854.53