Finding the Third Proportional to 30,910.50 and 67,441.50

Step by Step Solution

1. Step 1: Write the proportion equation
   30,910.50 : 67,441.50 = 67,441.50 : x
2. Step 2: Convert to fraction form
   30,910.50/67,441.50 = 67,441.50/x
3. Step 3: Cross multiply
   30,910.50x = 67,441.50 × 67,441.50
4. Step 4: Simplify right side
   30,910.50x = 4,548,355,922.25
5. Step 5: Solve for x
   x = 4,548,355,922.25/30,910.50
6. Step 6: Final answer
   x = 147,145.98