Finding the Third Proportional to 12,828 and 31,636.50

Step by Step Solution

1. Step 1: Write the proportion equation
   12,828 : 31,636.50 = 31,636.50 : x
2. Step 2: Convert to fraction form
   12,828/31,636.50 = 31,636.50/x
3. Step 3: Cross multiply
   12,828x = 31,636.50 × 31,636.50
4. Step 4: Simplify right side
   12,828x = 1,000,868,132.25
5. Step 5: Solve for x
   x = 1,000,868,132.25/12,828
6. Step 6: Final answer
   x = 78,022.15