Finding the Third Proportional to 12,119.63 and 18,718.59

Step by Step Solution

1. Step 1: Write the proportion equation
   12,119.63 : 18,718.59 = 18,718.59 : x
2. Step 2: Convert to fraction form
   12,119.63/18,718.59 = 18,718.59/x
3. Step 3: Cross multiply
   12,119.63x = 18,718.59 × 18,718.59
4. Step 4: Simplify right side
   12,119.63x = 350,385,751.98
5. Step 5: Solve for x
   x = 350,385,751.98/12,119.63
6. Step 6: Final answer
   x = 28,910.61