Finding the Third Proportional to 309,076 and 662,510

Step by Step Solution

1. Step 1: Write the proportion equation
   309,076 : 662,510 = 662,510 : x
2. Step 2: Convert to fraction form
   309,076/662,510 = 662,510/x
3. Step 3: Cross multiply
   309,076x = 662,510 × 662,510
4. Step 4: Simplify right side
   309,076x = 438,919,500,100
5. Step 5: Solve for x
   x = 438,919,500,100/309,076
6. Step 6: Final answer
   x = 1,420,102.18