Finding the Third Proportional to 12,129.75 and 16,299.56

Step by Step Solution

1. Step 1: Write the proportion equation
   12,129.75 : 16,299.56 = 16,299.56 : x
2. Step 2: Convert to fraction form
   12,129.75/16,299.56 = 16,299.56/x
3. Step 3: Cross multiply
   12,129.75x = 16,299.56 × 16,299.56
4. Step 4: Simplify right side
   12,129.75x = 265,675,737.69
5. Step 5: Solve for x
   x = 265,675,737.69/12,129.75
6. Step 6: Final answer
   x = 21,902.82