Finding the Third Proportional to 5,426 and 12,854

Step by Step Solution

1. Step 1: Write the proportion equation
   5,426 : 12,854 = 12,854 : x
2. Step 2: Convert to fraction form
   5,426/12,854 = 12,854/x
3. Step 3: Cross multiply
   5,426x = 12,854 × 12,854
4. Step 4: Simplify right side
   5,426x = 165,225,316
5. Step 5: Solve for x
   x = 165,225,316/5,426
6. Step 6: Final answer
   x = 30,450.67