Finding the Third Proportional to 8,309.50 and 12,470.34

Step by Step Solution

1. Step 1: Write the proportion equation
   8,309.50 : 12,470.34 = 12,470.34 : x
2. Step 2: Convert to fraction form
   8,309.50/12,470.34 = 12,470.34/x
3. Step 3: Cross multiply
   8,309.50x = 12,470.34 × 12,470.34
4. Step 4: Simplify right side
   8,309.50x = 155,509,473.24
5. Step 5: Solve for x
   x = 155,509,473.24/8,309.50
6. Step 6: Final answer
   x = 18,714.66