Finding the Third Proportional to 6,558 and 10,389.50

Step by Step Solution

1. Step 1: Write the proportion equation
   6,558 : 10,389.50 = 10,389.50 : x
2. Step 2: Convert to fraction form
   6,558/10,389.50 = 10,389.50/x
3. Step 3: Cross multiply
   6,558x = 10,389.50 × 10,389.50
4. Step 4: Simplify right side
   6,558x = 107,941,710.25
5. Step 5: Solve for x
   x = 107,941,710.25/6,558
6. Step 6: Final answer
   x = 16,459.55