Finding the Third Proportional to 3,986.72 and 5,856.68

Step by Step Solution

1. Step 1: Write the proportion equation
   3,986.72 : 5,856.68 = 5,856.68 : x
2. Step 2: Convert to fraction form
   3,986.72/5,856.68 = 5,856.68/x
3. Step 3: Cross multiply
   3,986.72x = 5,856.68 × 5,856.68
4. Step 4: Simplify right side
   3,986.72x = 34,300,696.96
5. Step 5: Solve for x
   x = 34,300,696.96/3,986.72
6. Step 6: Final answer
   x = 8,603.74