Finding the Third Proportional to 30,939 and 67,674

Step by Step Solution

1. Step 1: Write the proportion equation
   30,939 : 67,674 = 67,674 : x
2. Step 2: Convert to fraction form
   30,939/67,674 = 67,674/x
3. Step 3: Cross multiply
   30,939x = 67,674 × 67,674
4. Step 4: Simplify right side
   30,939x = 4,579,770,276
5. Step 5: Solve for x
   x = 4,579,770,276/30,939
6. Step 6: Final answer
   x = 148,025.80