Finding the Third Proportional to 6,558 and 10,390

Step by Step Solution

1. Step 1: Write the proportion equation
   6,558 : 10,390 = 10,390 : x
2. Step 2: Convert to fraction form
   6,558/10,390 = 10,390/x
3. Step 3: Cross multiply
   6,558x = 10,390 × 10,390
4. Step 4: Simplify right side
   6,558x = 107,952,100
5. Step 5: Solve for x
   x = 107,952,100/6,558
6. Step 6: Final answer
   x = 16,461.13