Finding the Third Proportional to 12,708 and 29,290.50

Step by Step Solution

1. Step 1: Write the proportion equation
   12,708 : 29,290.50 = 29,290.50 : x
2. Step 2: Convert to fraction form
   12,708/29,290.50 = 29,290.50/x
3. Step 3: Cross multiply
   12,708x = 29,290.50 × 29,290.50
4. Step 4: Simplify right side
   12,708x = 857,933,390.25
5. Step 5: Solve for x
   x = 857,933,390.25/12,708
6. Step 6: Final answer
   x = 67,511.28