Finding the Third Proportional to 199,686 and 300,342

Step by Step Solution

1. Step 1: Write the proportion equation
   199,686 : 300,342 = 300,342 : x
2. Step 2: Convert to fraction form
   199,686/300,342 = 300,342/x
3. Step 3: Cross multiply
   199,686x = 300,342 × 300,342
4. Step 4: Simplify right side
   199,686x = 90,205,316,964
5. Step 5: Solve for x
   x = 90,205,316,964/199,686
6. Step 6: Final answer
   x = 451,735.81