Finding the Third Proportional to 20,639.50 and 45,234.25

Step by Step Solution

1. Step 1: Write the proportion equation
   20,639.50 : 45,234.25 = 45,234.25 : x
2. Step 2: Convert to fraction form
   20,639.50/45,234.25 = 45,234.25/x
3. Step 3: Cross multiply
   20,639.50x = 45,234.25 × 45,234.25
4. Step 4: Simplify right side
   20,639.50x = 2,046,137,373.06
5. Step 5: Solve for x
   x = 2,046,137,373.06/20,639.50
6. Step 6: Final answer
   x = 99,136.96