Finding the Third Proportional to 200,548 and 300,865

Step by Step Solution

1. Step 1: Write the proportion equation
   200,548 : 300,865 = 300,865 : x
2. Step 2: Convert to fraction form
   200,548/300,865 = 300,865/x
3. Step 3: Cross multiply
   200,548x = 300,865 × 300,865
4. Step 4: Simplify right side
   200,548x = 90,519,748,225
5. Step 5: Solve for x
   x = 90,519,748,225/200,548
6. Step 6: Final answer
   x = 451,362.01