Finding the Third Proportional to 12,912 and 28,290

Step by Step Solution

1. Step 1: Write the proportion equation
   12,912 : 28,290 = 28,290 : x
2. Step 2: Convert to fraction form
   12,912/28,290 = 28,290/x
3. Step 3: Cross multiply
   12,912x = 28,290 × 28,290
4. Step 4: Simplify right side
   12,912x = 800,324,100
5. Step 5: Solve for x
   x = 800,324,100/12,912
6. Step 6: Final answer
   x = 61,982.97