Finding the Third Proportional to 12,856 and 28,172

Step by Step Solution

1. Step 1: Write the proportion equation
   12,856 : 28,172 = 28,172 : x
2. Step 2: Convert to fraction form
   12,856/28,172 = 28,172/x
3. Step 3: Cross multiply
   12,856x = 28,172 × 28,172
4. Step 4: Simplify right side
   12,856x = 793,661,584
5. Step 5: Solve for x
   x = 793,661,584/12,856
6. Step 6: Final answer
   x = 61,734.72