Finding the Third Proportional to 30,830 and 67,245

Step by Step Solution

1. Step 1: Write the proportion equation
   30,830 : 67,245 = 67,245 : x
2. Step 2: Convert to fraction form
   30,830/67,245 = 67,245/x
3. Step 3: Cross multiply
   30,830x = 67,245 × 67,245
4. Step 4: Simplify right side
   30,830x = 4,521,890,025
5. Step 5: Solve for x
   x = 4,521,890,025/30,830
6. Step 6: Final answer
   x = 146,671.75