Finding the Third Proportional to 10,872.56 and 15,516.56

Step by Step Solution

1. Step 1: Write the proportion equation
   10,872.56 : 15,516.56 = 15,516.56 : x
2. Step 2: Convert to fraction form
   10,872.56/15,516.56 = 15,516.56/x
3. Step 3: Cross multiply
   10,872.56x = 15,516.56 × 15,516.56
4. Step 4: Simplify right side
   10,872.56x = 240,763,711.82
5. Step 5: Solve for x
   x = 240,763,711.82/10,872.56
6. Step 6: Final answer
   x = 22,144.16