Finding the Third Proportional to 8,336.25 and 12,898.69

Step by Step Solution

1. Step 1: Write the proportion equation
   8,336.25 : 12,898.69 = 12,898.69 : x
2. Step 2: Convert to fraction form
   8,336.25/12,898.69 = 12,898.69/x
3. Step 3: Cross multiply
   8,336.25x = 12,898.69 × 12,898.69
4. Step 4: Simplify right side
   8,336.25x = 166,376,139.22
5. Step 5: Solve for x
   x = 166,376,139.22/8,336.25
6. Step 6: Final answer
   x = 19,958.15