Finding the Third Proportional to 140,442 and 300,566

Step by Step Solution

1. Step 1: Write the proportion equation
   140,442 : 300,566 = 300,566 : x
2. Step 2: Convert to fraction form
   140,442/300,566 = 300,566/x
3. Step 3: Cross multiply
   140,442x = 300,566 × 300,566
4. Step 4: Simplify right side
   140,442x = 90,339,920,356
5. Step 5: Solve for x
   x = 90,339,920,356/140,442
6. Step 6: Final answer
   x = 643,254.30