Finding the Third Proportional to 16,128.75 and 34,215

Step by Step Solution

1. Step 1: Write the proportion equation
   16,128.75 : 34,215 = 34,215 : x
2. Step 2: Convert to fraction form
   16,128.75/34,215 = 34,215/x
3. Step 3: Cross multiply
   16,128.75x = 34,215 × 34,215
4. Step 4: Simplify right side
   16,128.75x = 1,170,666,225
5. Step 5: Solve for x
   x = 1,170,666,225/16,128.75
6. Step 6: Final answer
   x = 72,582.58