Finding the Third Proportional to 30,930 and 67,380

Step by Step Solution

1. Step 1: Write the proportion equation
   30,930 : 67,380 = 67,380 : x
2. Step 2: Convert to fraction form
   30,930/67,380 = 67,380/x
3. Step 3: Cross multiply
   30,930x = 67,380 × 67,380
4. Step 4: Simplify right side
   30,930x = 4,540,064,400
5. Step 5: Solve for x
   x = 4,540,064,400/30,930
6. Step 6: Final answer
   x = 146,785.14