Finding the Third Proportional to 7,947 and 12,760.50

Step by Step Solution

1. Step 1: Write the proportion equation
   7,947 : 12,760.50 = 12,760.50 : x
2. Step 2: Convert to fraction form
   7,947/12,760.50 = 12,760.50/x
3. Step 3: Cross multiply
   7,947x = 12,760.50 × 12,760.50
4. Step 4: Simplify right side
   7,947x = 162,830,360.25
5. Step 5: Solve for x
   x = 162,830,360.25/7,947
6. Step 6: Final answer
   x = 20,489.54