Finding the Third Proportional to 20,850.50 and 30,724.50

Step by Step Solution

1. Step 1: Write the proportion equation
   20,850.50 : 30,724.50 = 30,724.50 : x
2. Step 2: Convert to fraction form
   20,850.50/30,724.50 = 30,724.50/x
3. Step 3: Cross multiply
   20,850.50x = 30,724.50 × 30,724.50
4. Step 4: Simplify right side
   20,850.50x = 943,994,900.25
5. Step 5: Solve for x
   x = 943,994,900.25/20,850.50
6. Step 6: Final answer
   x = 45,274.45