Finding the Third Proportional to 12,648 and 18,970.50

Step by Step Solution

1. Step 1: Write the proportion equation
   12,648 : 18,970.50 = 18,970.50 : x
2. Step 2: Convert to fraction form
   12,648/18,970.50 = 18,970.50/x
3. Step 3: Cross multiply
   12,648x = 18,970.50 × 18,970.50
4. Step 4: Simplify right side
   12,648x = 359,879,870.25
5. Step 5: Solve for x
   x = 359,879,870.25/12,648
6. Step 6: Final answer
   x = 28,453.50