Finding the Third Proportional to 8,079 and 12,931.50

Step by Step Solution

1. Step 1: Write the proportion equation
   8,079 : 12,931.50 = 12,931.50 : x
2. Step 2: Convert to fraction form
   8,079/12,931.50 = 12,931.50/x
3. Step 3: Cross multiply
   8,079x = 12,931.50 × 12,931.50
4. Step 4: Simplify right side
   8,079x = 167,223,692.25
5. Step 5: Solve for x
   x = 167,223,692.25/8,079
6. Step 6: Final answer
   x = 20,698.56