Finding the Third Proportional to 199,518 and 443,315

Step by Step Solution

1. Step 1: Write the proportion equation
   199,518 : 443,315 = 443,315 : x
2. Step 2: Convert to fraction form
   199,518/443,315 = 443,315/x
3. Step 3: Cross multiply
   199,518x = 443,315 × 443,315
4. Step 4: Simplify right side
   199,518x = 196,528,189,225
5. Step 5: Solve for x
   x = 196,528,189,225/199,518
6. Step 6: Final answer
   x = 985,014.83