Finding the Third Proportional to 140,386.50 and 300,870

Step by Step Solution

1. Step 1: Write the proportion equation
   140,386.50 : 300,870 = 300,870 : x
2. Step 2: Convert to fraction form
   140,386.50/300,870 = 300,870/x
3. Step 3: Cross multiply
   140,386.50x = 300,870 × 300,870
4. Step 4: Simplify right side
   140,386.50x = 90,522,756,900
5. Step 5: Solve for x
   x = 90,522,756,900/140,386.50
6. Step 6: Final answer
   x = 644,810.98