Finding the Third Proportional to 271,784.50 and 639,492

Step by Step Solution

1. Step 1: Write the proportion equation
   271,784.50 : 639,492 = 639,492 : x
2. Step 2: Convert to fraction form
   271,784.50/639,492 = 639,492/x
3. Step 3: Cross multiply
   271,784.50x = 639,492 × 639,492
4. Step 4: Simplify right side
   271,784.50x = 408,950,018,064
5. Step 5: Solve for x
   x = 408,950,018,064/271,784.50
6. Step 6: Final answer
   x = 1,504,684.84