Finding the Third Proportional to 140,498 and 300,748

Step by Step Solution

1. Step 1: Write the proportion equation
   140,498 : 300,748 = 300,748 : x
2. Step 2: Convert to fraction form
   140,498/300,748 = 300,748/x
3. Step 3: Cross multiply
   140,498x = 300,748 × 300,748
4. Step 4: Simplify right side
   140,498x = 90,449,359,504
5. Step 5: Solve for x
   x = 90,449,359,504/140,498
6. Step 6: Final answer
   x = 643,776.85