Finding the Third Proportional to 11,121.05 and 12,305.67

Step by Step Solution

1. Step 1: Write the proportion equation
   11,121.05 : 12,305.67 = 12,305.67 : x
2. Step 2: Convert to fraction form
   11,121.05/12,305.67 = 12,305.67/x
3. Step 3: Cross multiply
   11,121.05x = 12,305.67 × 12,305.67
4. Step 4: Simplify right side
   11,121.05x = 151,429,560.30
5. Step 5: Solve for x
   x = 151,429,560.30/11,121.05
6. Step 6: Final answer
   x = 13,616.48