Finding the Third Proportional to 12,688 and 28,296

Step by Step Solution

1. Step 1: Write the proportion equation
   12,688 : 28,296 = 28,296 : x
2. Step 2: Convert to fraction form
   12,688/28,296 = 28,296/x
3. Step 3: Cross multiply
   12,688x = 28,296 × 28,296
4. Step 4: Simplify right side
   12,688x = 800,663,616
5. Step 5: Solve for x
   x = 800,663,616/12,688
6. Step 6: Final answer
   x = 63,104.01