Finding the Third Proportional to 199,500 and 315,861

Step by Step Solution

1. Step 1: Write the proportion equation
   199,500 : 315,861 = 315,861 : x
2. Step 2: Convert to fraction form
   199,500/315,861 = 315,861/x
3. Step 3: Cross multiply
   199,500x = 315,861 × 315,861
4. Step 4: Simplify right side
   199,500x = 99,768,171,321
5. Step 5: Solve for x
   x = 99,768,171,321/199,500
6. Step 6: Final answer
   x = 500,091.08