Finding the Third Proportional to 5,412 and 12,930

Step by Step Solution

1. Step 1: Write the proportion equation
   5,412 : 12,930 = 12,930 : x
2. Step 2: Convert to fraction form
   5,412/12,930 = 12,930/x
3. Step 3: Cross multiply
   5,412x = 12,930 × 12,930
4. Step 4: Simplify right side
   5,412x = 167,184,900
5. Step 5: Solve for x
   x = 167,184,900/5,412
6. Step 6: Final answer
   x = 30,891.52