Finding the Third Proportional to 10,939.78 and 16,972.17

Step by Step Solution

1. Step 1: Write the proportion equation
   10,939.78 : 16,972.17 = 16,972.17 : x
2. Step 2: Convert to fraction form
   10,939.78/16,972.17 = 16,972.17/x
3. Step 3: Cross multiply
   10,939.78x = 16,972.17 × 16,972.17
4. Step 4: Simplify right side
   10,939.78x = 288,054,618.15
5. Step 5: Solve for x
   x = 288,054,618.15/10,939.78
6. Step 6: Final answer
   x = 26,330.93