Finding the Third Proportional to 8,143.50 and 20,845.50

Step by Step Solution

1. Step 1: Write the proportion equation
   8,143.50 : 20,845.50 = 20,845.50 : x
2. Step 2: Convert to fraction form
   8,143.50/20,845.50 = 20,845.50/x
3. Step 3: Cross multiply
   8,143.50x = 20,845.50 × 20,845.50
4. Step 4: Simplify right side
   8,143.50x = 434,534,870.25
5. Step 5: Solve for x
   x = 434,534,870.25/8,143.50
6. Step 6: Final answer
   x = 53,359.72