Finding the Third Proportional to 8,619.47 and 13,179.94

Step by Step Solution

1. Step 1: Write the proportion equation
   8,619.47 : 13,179.94 = 13,179.94 : x
2. Step 2: Convert to fraction form
   8,619.47/13,179.94 = 13,179.94/x
3. Step 3: Cross multiply
   8,619.47x = 13,179.94 × 13,179.94
4. Step 4: Simplify right side
   8,619.47x = 173,710,752.50
5. Step 5: Solve for x
   x = 173,710,752.50/8,619.47
6. Step 6: Final answer
   x = 20,153.30