Finding the Third Proportional to 31,400 and 67,930

Step by Step Solution

1. Step 1: Write the proportion equation
   31,400 : 67,930 = 67,930 : x
2. Step 2: Convert to fraction form
   31,400/67,930 = 67,930/x
3. Step 3: Cross multiply
   31,400x = 67,930 × 67,930
4. Step 4: Simplify right side
   31,400x = 4,614,484,900
5. Step 5: Solve for x
   x = 4,614,484,900/31,400
6. Step 6: Final answer
   x = 146,958.12