Finding the Third Proportional to 49,578 and 65,619

Step by Step Solution

1. Step 1: Write the proportion equation
   49,578 : 65,619 = 65,619 : x
2. Step 2: Convert to fraction form
   49,578/65,619 = 65,619/x
3. Step 3: Cross multiply
   49,578x = 65,619 × 65,619
4. Step 4: Simplify right side
   49,578x = 4,305,853,161
5. Step 5: Solve for x
   x = 4,305,853,161/49,578
6. Step 6: Final answer
   x = 86,850.08