Finding the Third Proportional to 2,179.88 and 5,145.38

Step by Step Solution

1. Step 1: Write the proportion equation
   2,179.88 : 5,145.38 = 5,145.38 : x
2. Step 2: Convert to fraction form
   2,179.88/5,145.38 = 5,145.38/x
3. Step 3: Cross multiply
   2,179.88x = 5,145.38 × 5,145.38
4. Step 4: Simplify right side
   2,179.88x = 26,474,883.89
5. Step 5: Solve for x
   x = 26,474,883.89/2,179.88
6. Step 6: Final answer
   x = 12,145.14