Finding the Third Proportional to 140,440 and 300,562

Step by Step Solution

1. Step 1: Write the proportion equation
   140,440 : 300,562 = 300,562 : x
2. Step 2: Convert to fraction form
   140,440/300,562 = 300,562/x
3. Step 3: Cross multiply
   140,440x = 300,562 × 300,562
4. Step 4: Simplify right side
   140,440x = 90,337,515,844
5. Step 5: Solve for x
   x = 90,337,515,844/140,440
6. Step 6: Final answer
   x = 643,246.34