Finding the Third Proportional to 12,904 and 28,156

Step by Step Solution

1. Step 1: Write the proportion equation
   12,904 : 28,156 = 28,156 : x
2. Step 2: Convert to fraction form
   12,904/28,156 = 28,156/x
3. Step 3: Cross multiply
   12,904x = 28,156 × 28,156
4. Step 4: Simplify right side
   12,904x = 792,760,336
5. Step 5: Solve for x
   x = 792,760,336/12,904
6. Step 6: Final answer
   x = 61,435.24