Finding the Third Proportional to 12,990 and 27,822

Step by Step Solution

1. Step 1: Write the proportion equation
   12,990 : 27,822 = 27,822 : x
2. Step 2: Convert to fraction form
   12,990/27,822 = 27,822/x
3. Step 3: Cross multiply
   12,990x = 27,822 × 27,822
4. Step 4: Simplify right side
   12,990x = 774,063,684
5. Step 5: Solve for x
   x = 774,063,684/12,990
6. Step 6: Final answer
   x = 59,589.20