Finding the Third Proportional to 30,939.25 and 67,433.50

Step by Step Solution

1. Step 1: Write the proportion equation
   30,939.25 : 67,433.50 = 67,433.50 : x
2. Step 2: Convert to fraction form
   30,939.25/67,433.50 = 67,433.50/x
3. Step 3: Cross multiply
   30,939.25x = 67,433.50 × 67,433.50
4. Step 4: Simplify right side
   30,939.25x = 4,547,276,922.25
5. Step 5: Solve for x
   x = 4,547,276,922.25/30,939.25
6. Step 6: Final answer
   x = 146,974.37