Finding the Third Proportional to 30,220.50 and 68,380.50

Step by Step Solution

1. Step 1: Write the proportion equation
   30,220.50 : 68,380.50 = 68,380.50 : x
2. Step 2: Convert to fraction form
   30,220.50/68,380.50 = 68,380.50/x
3. Step 3: Cross multiply
   30,220.50x = 68,380.50 × 68,380.50
4. Step 4: Simplify right side
   30,220.50x = 4,675,892,780.25
5. Step 5: Solve for x
   x = 4,675,892,780.25/30,220.50
6. Step 6: Final answer
   x = 154,725.86