Finding the Third Proportional to 5,800 and 12,910

Step by Step Solution

1. Step 1: Write the proportion equation
   5,800 : 12,910 = 12,910 : x
2. Step 2: Convert to fraction form
   5,800/12,910 = 12,910/x
3. Step 3: Cross multiply
   5,800x = 12,910 × 12,910
4. Step 4: Simplify right side
   5,800x = 166,668,100
5. Step 5: Solve for x
   x = 166,668,100/5,800
6. Step 6: Final answer
   x = 28,735.88