Finding the Third Proportional to 20,959.50 and 28,480.50

Step by Step Solution

1. Step 1: Write the proportion equation
   20,959.50 : 28,480.50 = 28,480.50 : x
2. Step 2: Convert to fraction form
   20,959.50/28,480.50 = 28,480.50/x
3. Step 3: Cross multiply
   20,959.50x = 28,480.50 × 28,480.50
4. Step 4: Simplify right side
   20,959.50x = 811,138,880.25
5. Step 5: Solve for x
   x = 811,138,880.25/20,959.50
6. Step 6: Final answer
   x = 38,700.30