Finding the Third Proportional to 8,159.63 and 12,409.88

Step by Step Solution

1. Step 1: Write the proportion equation
   8,159.63 : 12,409.88 = 12,409.88 : x
2. Step 2: Convert to fraction form
   8,159.63/12,409.88 = 12,409.88/x
3. Step 3: Cross multiply
   8,159.63x = 12,409.88 × 12,409.88
4. Step 4: Simplify right side
   8,159.63x = 154,004,997.52
5. Step 5: Solve for x
   x = 154,004,997.52/8,159.63
6. Step 6: Final answer
   x = 18,874.03