Finding the Third Proportional to 4,233.50 and 8,405.50

Step by Step Solution

1. Step 1: Write the proportion equation
   4,233.50 : 8,405.50 = 8,405.50 : x
2. Step 2: Convert to fraction form
   4,233.50/8,405.50 = 8,405.50/x
3. Step 3: Cross multiply
   4,233.50x = 8,405.50 × 8,405.50
4. Step 4: Simplify right side
   4,233.50x = 70,652,430.25
5. Step 5: Solve for x
   x = 70,652,430.25/4,233.50
6. Step 6: Final answer
   x = 16,688.89