Finding the Third Proportional to 12,987 and 28,566

Step by Step Solution

1. Step 1: Write the proportion equation
   12,987 : 28,566 = 28,566 : x
2. Step 2: Convert to fraction form
   12,987/28,566 = 28,566/x
3. Step 3: Cross multiply
   12,987x = 28,566 × 28,566
4. Step 4: Simplify right side
   12,987x = 816,016,356
5. Step 5: Solve for x
   x = 816,016,356/12,987
6. Step 6: Final answer
   x = 62,833.32