Finding the Third Proportional to 140,750 and 304,990

Step by Step Solution

1. Step 1: Write the proportion equation
   140,750 : 304,990 = 304,990 : x
2. Step 2: Convert to fraction form
   140,750/304,990 = 304,990/x
3. Step 3: Cross multiply
   140,750x = 304,990 × 304,990
4. Step 4: Simplify right side
   140,750x = 93,018,900,100
5. Step 5: Solve for x
   x = 93,018,900,100/140,750
6. Step 6: Final answer
   x = 660,880.28