Finding the Third Proportional to 12,815 and 28,154

Step by Step Solution

1. Step 1: Write the proportion equation
   12,815 : 28,154 = 28,154 : x
2. Step 2: Convert to fraction form
   12,815/28,154 = 28,154/x
3. Step 3: Cross multiply
   12,815x = 28,154 × 28,154
4. Step 4: Simplify right side
   12,815x = 792,647,716
5. Step 5: Solve for x
   x = 792,647,716/12,815
6. Step 6: Final answer
   x = 61,853.12