Finding the Third Proportional to 8,926.50 and 13,129.50

Step by Step Solution

1. Step 1: Write the proportion equation
   8,926.50 : 13,129.50 = 13,129.50 : x
2. Step 2: Convert to fraction form
   8,926.50/13,129.50 = 13,129.50/x
3. Step 3: Cross multiply
   8,926.50x = 13,129.50 × 13,129.50
4. Step 4: Simplify right side
   8,926.50x = 172,383,770.25
5. Step 5: Solve for x
   x = 172,383,770.25/8,926.50
6. Step 6: Final answer
   x = 19,311.46