Finding the Third Proportional to 400,522 and 619,960

Step by Step Solution

1. Step 1: Write the proportion equation
   400,522 : 619,960 = 619,960 : x
2. Step 2: Convert to fraction form
   400,522/619,960 = 619,960/x
3. Step 3: Cross multiply
   400,522x = 619,960 × 619,960
4. Step 4: Simplify right side
   400,522x = 384,350,401,600
5. Step 5: Solve for x
   x = 384,350,401,600/400,522
6. Step 6: Final answer
   x = 959,623.70