Finding the Third Proportional to 271,855.50 and 639,624

Step by Step Solution

1. Step 1: Write the proportion equation
   271,855.50 : 639,624 = 639,624 : x
2. Step 2: Convert to fraction form
   271,855.50/639,624 = 639,624/x
3. Step 3: Cross multiply
   271,855.50x = 639,624 × 639,624
4. Step 4: Simplify right side
   271,855.50x = 409,118,861,376
5. Step 5: Solve for x
   x = 409,118,861,376/271,855.50
6. Step 6: Final answer
   x = 1,504,912.95