Finding the Third Proportional to 20,147 and 28,321.50

Step by Step Solution

1. Step 1: Write the proportion equation
   20,147 : 28,321.50 = 28,321.50 : x
2. Step 2: Convert to fraction form
   20,147/28,321.50 = 28,321.50/x
3. Step 3: Cross multiply
   20,147x = 28,321.50 × 28,321.50
4. Step 4: Simplify right side
   20,147x = 802,107,362.25
5. Step 5: Solve for x
   x = 802,107,362.25/20,147
6. Step 6: Final answer
   x = 39,812.74