Finding the Third Proportional to 140,098 and 311,300

Step by Step Solution

1. Step 1: Write the proportion equation
   140,098 : 311,300 = 311,300 : x
2. Step 2: Convert to fraction form
   140,098/311,300 = 311,300/x
3. Step 3: Cross multiply
   140,098x = 311,300 × 311,300
4. Step 4: Simplify right side
   140,098x = 96,907,690,000
5. Step 5: Solve for x
   x = 96,907,690,000/140,098
6. Step 6: Final answer
   x = 691,713.59