Finding the Third Proportional to 300,224 and 638,590

Step by Step Solution

1. Step 1: Write the proportion equation
   300,224 : 638,590 = 638,590 : x
2. Step 2: Convert to fraction form
   300,224/638,590 = 638,590/x
3. Step 3: Cross multiply
   300,224x = 638,590 × 638,590
4. Step 4: Simplify right side
   300,224x = 407,797,188,100
5. Step 5: Solve for x
   x = 407,797,188,100/300,224
6. Step 6: Final answer
   x = 1,358,309.76